Although no one was hurt in the attack, it dampened the relative sense of security among Misrata's residents, who had believed the siege on their city was broken after rebels drove out loyalist forces in mid-May.

"Everyone is worried. We don't know where to go anymore. Only when I die will I be safe," said Mohammed Mabrouk, who lives near one of two houses hit by the rockets. Two more landed in open areas.

Fighting has been largely on Misrata's far western and eastern edges, where the rebel rag-tag army is sustaining heavier casualties by the day from the better equipped and better trained government forces.

Rebels have been trying to advance west toward the town of Zlitan, where Gaddafi's soldiers are imposing a tight siege. Libyan television said on Wednesday that "dozens" of people were killed in Zlitan after NATO naval ships shelled the town.

Reuters