FREMONT, Calif. - The Latest on two Northern California police officers were shot after a traffic stop turned violent (all times local):

3 A.M.

Officers have fire tear gas into a house where a gunman suspected of shooting and wounding two Northern California police officers has taken refuge and was in a standoff with police early Thursday.

Sgt. Ray Kelly of the Alameda County Sheriff's office tells The Associated Press that the gunman is still refusing to come out.

He says that so far there has not been any gunfire during the standoff and no one has been hurt.

The officers from the Fremont Police Department were shot Wednesday afternoon after a traffic stop turned violent, leaving one officer critical after surgery and one stable.

The shootings prompted a manhunt that involved a house to house search that lasted well into the night.

Kelly says that a lone suspect was eventually tracked down to a home in Fremont, where police had been negotiating with him to surrender.

2:15 A.M.

Authorities say a gunman suspected of shooting and wounding two Northern California police officers was in an armed standoff with law officers early Thursday.

The officers from the Fremont Police Department were shot Wednesday afternoon after a traffic stop turned violent.

That prompted a manhunt that involved a house to house search that lasted well into the night.

Sgt. Ray Kelly of the Alameda County Sheriff's office tells The Associated Press that a lone suspect was eventually tracked down to a home in Fremont, where he was involved in the standoff.

He says police right now are negotiating with him to surrender.

No one else has been injured since the police shootings, which left the officers hospitalized — one critical after surgery and one stable.

12:01 a.m.

Police in Northern California are searching for at least one suspect after two police officers were wounded when a traffic stop turned violent.

The Fremont Police Department says the gunman was believed to have fled to a residential neighbourhood.

He says the area was still on lock down late Wednesday night with no one allowed to go in or leave the six-block area.

Police say surveillance video and witnesses confirmed the man was still carrying the gun after he shot the two officers Wednesday afternoon.

Fremont police spokeswoman Officer Geneva Bosques says one of the officers is in critical condition after surgery. The other officer remains in stable condition.

News from © The Associated Press, 2016