Swedish artist attacked during lecture

UPPSALA, Sweden, May 12 (UPI) -- A Swedish artist who depicted the Prophet Mohammed as a dog was in a secure location Wednesday after being attacked during a lecture, police in Sweden say.

Lars Vilks was speaking to the philosophy faculty at Uppsala University when a man in the audience attacked him, Sweden's The Local reports.

"The man was sitting in the front row and suddenly came rushing towards me," Vilks said. "He head-butted me, and I was thrown against the wall and dropped my glasses."

Vilks said he wasn't injured, "just knocked about."

Police arrested two people.

An al-Qaida-affiliated organization has offered $150,000 to anyone who kills Vilks.