George Galloway, a British lawmaker known for his anti-Israel remarks, was hospitalized following an attack on the streets of Notting Hill.
The politician was taken to a London hospital for treatment and was released on Saturday afternoon.
Galloway was posing for pictures with the public on the streets of west London when a man lunged at him. A spokesman said he thought the attack was connected to the MP's views vis-a-vis Israel, since the assailant made remarks about the Holocaust as he began punching him.
Galloway, who states on his Twitter page that he is "pro-Palestine" and "anti-war," made some controversial comments during Israel's 50-day operation in Gaza when he referred to his city as an "Israel-free zone" and called for a boycott on Israeli universities, products and tourists.
The politician is a member of the Respect Party, and was caught on tape on August 2 saying, "We have declared Bradford an Israel-free zone," adding "We reject this illegal, barbarous, savage state that calls itself Israel."
The controversial MP has always advocated for Palestinians and represents a mostly Muslim constituency.
His party posted a picture on social media, showing a bruised Galloway and thanking all the "well-wishers."
The police said a suspect was found a short time after they were called to the scene and arrested. He remains in the south London police station.