Banksy's migrant rescue boat stranded at sea with more than 200 on board
"We are reaching a state of emergency. We need immediate assistance," said one tweet, adding that it was also carrying a body bag containing the corpse of one migrant who had died.
The coastguard said a patrol boat dispatched from the southern Italian island of Lampedusa had taken on board 49 of "those considered most vulnerable" among the 219 migrants picked up by the ship since Thursday off the coast of Libya.
Named after a French feminist anarchist, the Louise Michel started operating last week. Despite the help from Italy, it has still not found a safe port for the rest of the mainly African migrants on board.
The 49 people who were transferred off the ship include 32 women and 13 children, the Italian coastguard said.