BAGHDAD, Jan. 29 (UPI) -- Three separate bombings targeting security forces shook Baghdad Tuesday, injuring 18 people but causing no fatalities, Iraqi Interior Ministry officials said.

Police said 10 of the injured in two of the blasts were police officers and the rest were civilians, the Kuwait News Agency reported. The third explosion caused no injuries, police said.

Northwest of Baghdad in Baquba, morgue director Ahmed Fuad told CNN the bodies of 19 males had been found around Diyala province, nine of them beheaded. U.S. and Iraqi forces have been making a push against al-Qaida and other militant groups, and CNN said some of the victims were thought to be al-Qaida members slain by other militants.

The U.S. military issued a release saying five of its troops were killed in northern Iraq on Monday, KUNA said. The deaths happened near Mosul, where Iraqi troops are massing for a major offensive against insurgents.

The statement said a U.S. vehicle was hit by a roadside bomb and then insurgents using automatic rifles opened fire on the convoy.

There have been 3,939 U.S. military deaths since the war began in March 2003, the report said.

Voters flock to polls for Florida primary

MIAMI, Jan. 29 (UPI) -- Voting is underway Tuesday in Florida's presidential primary with election officials predicting a high turnout, the Miami Herald reported.

Polls suggested Democrats would favor Sen. Hillary Clinton, D-N.Y., while the race for the Republican nod appeared to favor Sen. John McCain, R-Ariz., but only by a slim margin.

During the last contested primary for both parties in 2000, only about 19 percent, or 1.34 million Florida voters showed up, but two weeks of advance and absentee voting has already seen 1.05 million ballots cast, leading officials to expect high turnouts at the 6,913 precincts, the newspaper said.

There are 10.2 million registered voters in the state, which has an eight-year checkered history with technical and mechanical voting glitches. There were no reports of malfunctions or problems two hours into the 12-hour voting window, the newspaper said.

Poll: Clinton, McCain still lead in Calif.

LOS ANGELES, Jan. 29 (UPI) -- A poll Tuesday said Sen. John McCain, R-Ariz., and Sen. Hillary Clinton, D-N.Y., enjoyed double-digit leads in California heading into Super Tuesday voting.

California is a major prize in the Feb. 5 presidential primaries with a lot of delegates at stake and a chance for all the candidates to benefit now that the California is no longer a winner-take-all state.

The Los Angeles Times/CNN/Politico Poll gave McCain 39 percent of the likely Republican vote compared to 26 percent for former Massachusetts Gov. Mitt Romney. Clinton had 49 percent of the votes on the Democratic side and Sen. Barack Obama, D-Ill., 32 percent.

The other contenders in both parties trailed in the teens or single digits.

Romney appeared to have solid support among voters planning to vote by mail, the Times said. About half of the voters in the Golden State planned to cast mail in ballots. Independent voters are allowed to cast ballots in the Democratic race, which some analysts have predicted would boost Obama.

The survey was conducted Jan 23-27 and polled 437 likely Republican voters and 690 Democrats with margins for error of 4 percentage points for the Democrats and 5 percentages points for the Republicans.

Heavy snow affects 77 million in China

BEIJING, Jan. 29 (UPI) -- Emergency officials in China said more than 77 million people have been adversely affected by unprecedented heavy snowfall in 14 provinces.

Since the snowfall began Jan. 10, at least 24 deaths have been blamed on the weather, the Ministry of Civil Affairs told reporters in Beijing.

The problems are compounded by the tradition of millions of citizens to return to their hometowns for Spring Festival, or the Chinese New Year celebrations that fall on Feb. 7, the Shanghai Daily reported.

Some 200,000 people remained stranded at the main train station in Guangzhou, capital of Guangdong Province, down from 500,000 two days ago, the newspaper said.

The provincial railway authority began running ads urging people to give up their annual trips home, Dragon TV reported.

Chinese Premier Wen Jiabao flew and then had to take a train to Changsha City, the capital of Hunan Province Monday night to assess the disaster relief situation, Xinhua said.

At the city's main train station, Wen used a megaphone to wish the stranded passengers a happy Spring Festival and said everything that could be done to keep travel moving was being done, the report said.

Gov't skirted reports on FEMA trailers

NEW ORLEANS, Jan. 29 (UPI) -- A congressional committee said emergency management officials downplayed the risk of formaldehyde in trailers for hurricane victims along the U.S. Gulf Coast.

The U.S. House of Representatives Committee on Science and Technology said that officials at the Federal Emergency Management Agency and the Department of Health and Human Services eluded scientific review procedures in reporting the dangers of formaldehyde to avoid legal liability, The Times-Picayune, a New Orleans newspaper, said Tuesday.

"FEMA officials actually hid, manipulated or simply ignored the scientific work and concerns of federal scientists to justify their own policy and legal objectives," committee Chairman Rep. Brad Miller, D-N.C., said.

Some hurricane victims complained of various irritating symptoms in 2006 prompting the Sierra Club to conduct air-quality tests, the Times-Picayune said. The results of the tests suggested formaldehyde, a "probable human carcinogen," was the likely irritant.

A February 2007 Environmental Protection Agency study found formaldehyde levels "were below those expected to produce adverse health effects."

A U.S. government health scientist called the report "incomplete and perhaps misleading," telling FEMA attorneys there "is no recognized 'safe levels' of exposure."

The House committee said researchers tried to "bypass" the scientist's concerns but FEMA denied in a statement it tried to "suppress" information about the formaldehyde levels.