At least six people died and at least nine were injured in an early-morning shooting in Sacramento, California, the city's police department said on Twitter.
Police said several blocks of a commercial stretch of the downtown area were closed while they investigate. Videos posted online showed people shouting and running in the street.
Reuters could not independently verify the footage.
The incident comes a little more than a month after a man shot and killed his three children and a fourth person before taking his own life in the same city.
No evidence alleged Bondi gunmen received military training in Philippines
At least 12 killed in Nigeria mining site attack
Russian attack on Ukraine's central Cherkasy injures six, causes blackouts
UN, aid groups warn Gaza operations at risk from Israel impediments
Israel approves natural gas deal with Egypt, Netanyahu says
US approves $11.1 billion largest-ever arms package for Taiwan
Trump adds seven countries to full travel ban list
Indian parliament votes to allow private firms in nuclear power sector
