The police seized a painting of the president and prime minister in women’s underwear from an art gallery in St. Petersburg, saying the display had broken unspecified laws. The police service said it had taken paintings from the Museum of Power gallery on Monday after receiving reports they were illegal. One painting showed President Vladimir V. Putin wearing a tightfitting slip and brushing the hair of Prime Minister Dmitri A. Medvedev, who is wearing underpants and a bra. The officers also removed a picture of the head of the Russian Orthodox Church covered in tattoos and two others poking fun at lawmakers who have backed a law banning so-called gay propaganda, gallery officials said. The law has prompted protests and calls for a boycott of the Winter Olympics in Sochi in February.