been, a period of respect, after the police killing of a teenage boy on tuesday. he said additional resources would be made available to deal with unrest. the third night, and worst night of rioting so far, left buildings, including libraries and schools burnt shops looted. nearly 900 people were arrested; 250 police were injured. france s three biggest cities paris, marseille and lyon are suspending or restricting public transport from friday evening. marseille has also banned public demonstrations. the teenager, named as nahel m, was shot during a traffic stop. the policeman has been charged with voluntary homicide. he s also apologised to the teenager s family. overnight, 40,000 extra police officers were deployed across france, in an attempt to restore calm. the prime minister said the government was considering all options, but some ministers oppose declaring a state of emergency. lets get the latest from our correspondent. for the third night in a row, riots sprea