Mayor Luke Ravenstahl defended the actions of the police department Monday, the Pittsburgh Post-Gazette reported. But he promised a thorough review of the city's performance.
"As a whole, the police department responded admirably," the mayor said. "Nobody was significantly injured."
More than 100 people were arrested Friday, including some reporters, and police used tear gas on protesters. Activists say police overreacted.
There is also debate over whether hosting the summit was an economic winner. Business owners complain they were forced to close because of tight security downtown, losing thousands of dollars.
But city officials and other business leaders say the international delegations, the news media and even the protesters spent as much as $35 million on everything from hotel rooms to the Japanese delegation's order of 200 bottles of local red wine. They say the news stories provided publicity worth at least three times that amount.