Gao Zhen, a Chinese artist who has drawn international acclaim for works critiquing the Cultural Revolution, has been detained in China, his brother and artistic partner Gao Qiang said on Monday.

The Gao brothers are best known for their statues depicting Mao Zedong in provocative or irreverent ways, such as “Mao’s Guilt,” a bronze statue depicting the leader on his knees, supplicant and remorseful.

The police in Sanhe City detained Gao Zhen, who moved to the United States two years ago, last week while he was visiting China, his younger brother said in an email, on suspicion of slandering China’s heroes and martyrs — a criminal offense punishable by up to three years in prison.

The police also confiscated several of the brothers’ artworks, all of which were created more than 10 years ago and “reassessed Mao’s Cultural Revolution,” Gao Qiang said. The works included “Mao’s Guilt”; “The Execution of Christ,” a statue depicting Jesus facing down a firing squad of Maos; and “Miss Mao,” a collection of statues of Mao with large breasts and a protruding, Pinocchio-like nose.

About 30 police officers stormed the brothers’ art studio on Aug. 26 in Yanjiao, a town in Sanhe City about an hour away from Beijing, Gao Qiang said. The officers asked Gao Zhen to hand over his mobile phone, and when he refused, they handcuffed and arrested him, Gao Qiang said. Gao Zhen was in China with his wife and son, visiting relatives, his brother said.

The next day, Gao Zhen’s wife was notified by the Sanhe City public security bureau that he was being detained on suspicion of slandering heroes and martyrs, Gao Qiang said.