POLICE in ex-Soviet Azerbaijan have detained 50 opposition activists who tried for a second day to stage an antigovernment protest inspired by the uprisings in the Arab world. About 200 members of the opposition Musavat party gathered at Fountain Square in central Baku for the protest, but were quickly dispersed by police, an AFP reporter at the scene said. Protesters including Musavat leaders Arif Hajili and Tofik Yakublu chanted ‘‘ Liberty! Resignation!’’ as police led them away into police buses. Some of them were released soon afterward. Isa Gambar, the head of Musavat, told AFP that a revolution in Azerbaijan was imminent if the authorities failed to initiate democratic reforms.