(CNN)A far-right German lawmaker has been beaten unconscious by at least three masked assailants in an attack seen by police as "politically motivated."
Frank Magnitz, a member of parliament and the leader of the anti-immigration Alternative for Germany party (AfD) in Bremen, was assaulted on Monday afternoon as he walked through the center of the city.
Masked men knocked him unconscious with a piece of wood "and kicked him further" in the head as he lay on the ground, AfD wrote in a statement.
A graphic image of the 66-year-old lying unconscious in a hospital bed was released by the party. It showed a large gash on his forehead, and his face was swollen and covered in blood.
Bremen police, who have begun an investigation into the assault, said two craftsmen called an ambulance after discovering Magnitz lying on the ground.
In an earlier statement, the police said that "due to the function of the aggrieved party, a political motivation of the act can be assumed."
'Fight hate with hate, you allow hate to prevail'
AfD leader Alexander Gauland told a press conference Tuesday that Magnitz is now conscious and is expected to make a full recovery.
The party called Monday's attack a "black day for democracy" and voices across the political spectrum condemned the attack on Magnitz.
Steffen Seibert, the chief spokesman for German Chancellor Angela Merkel, said he hopes the police will "apprehend the perpetrators" quickly.
Cem Ozdemir, a lawmaker for the Greens, wrote on Twitter that "there is no justification for violence even against the AfD... if you fight hate with hate, you allow hate to prevail."
"Violence must never be a means of political confrontation -- regardless of who or what the motives are for it. There is no justification for this," Foreign Minister Heiko Maas, from the SPD party, wrote on Twitter.
This attack comes after an explosion targeted an AfD office in the eastern state of Saxony on January 3. Police said there has been a rise in attacks against the party, and that most incidents were acts of vandalism, Reuters reports.
Anti-immigration and anti-Islam platform
The AfD, which was only set up around five years ago, become the first far-right party to enter the Bundestag since 1961. It ran on an anti-immigration and anti-Islam platform, winning almost 13% of the vote in the 2017 federal elections.
The party says that Islam contradicts German's constitution and insists that the country should accept only migrants with high technical skills.