Two men are dead and a third is injured after Bay Area police responded with force in three separate incidents this weekend, including one that appears to have been a "suicide by cop."

Vallejo, 6 p.m. Saturday
At 5:47 p.m. Saturday, Vallejo police received a strange 911 call: While driving through the parking lot of the Vallejo Corners shopping center, the caller's vehicle was struck by a beer bottle, and the alleged thrower was armed with a knife and "seemed agitated."

When a uniformed cop responded to the scene, the man with the knife (who has yet to be identified pending notification of his family) confronted the officer, and displayed what appeared to be a firearm in his waistband, Vallejo police said in a statement.

Though he told the man to drop the knife, the man refused and approached the cop. The officer then shot the man, who was taken to a nearby hospital and was pronounced dead at 7:50 p.m.

When police retrieved the apparent firearm from the man, they determined that the weapon was a fake. In the man's vehicle, police found a letter apologizing for the trouble he put police through and for causing them to end his life.

According to police, the man had had "previous gun-related and other contacts" with law enforcement prior to this incident.

Richmond, 7:15 p.m. Saturday
According to Richmond police Captain Bisa French, an RPD sergeant on patrol attempted to initiate a traffic stop at 25th Street and Roosevelt Avenue. The driver, identified by the Chron as 19-year-old Daniel Tolosa, instead took off and bailed from the PT Cruiser he was driving a little less than a mile from the scene of the abortive stop.

As the pursuit continued on foot, the sergeant (who had been patrolling alone) and Tolosa exchanged gunfire on multiple occasions. While the sergeant escaped injury, Tolosa was eventually struck, was taken into custody, and was transported to the hospital with injuries that are not considered life-threatening.

Remarkably, given the gun battle, French said no bystanders were struck. She was not sure if any buildings in the area were hit during the exchange.

A gun believed to be Tolosa's was recovered at the scene, French says.

French did not know why Tolosa was pulled over, or why he fled. According to the Chron, Tolosa "has a criminal history that includes resisting arrest and weapons violations."

Santa Clara, 2 a.m. Sunday
Two Santa Clara police officers were driving into the parking lot of a 7-11 store at 2105 Scott Boulevard when they realized that an armed robbery was going down — at that very moment — inside the convenience store, Santa Clara police Lt. Kurt Clarke says.

According to Clarke, the officers saw the suspect aim a gun at the store clerk and fire a shot (the clerk wasn't struck). The man then left the store and confronted the two officers.

The man didn't "comply with the officers’ commands” to drop his weapon, Clarke said.

"Fearing for their lives and safety of citizens in the parking lot, the officers discharged their firearms, fatally wounding the suspect.”

Clarke says that SCPD found a loaded gun and the money from the 7-11 heist next to the suspect's body. The dead man has not been identified at publication time.