The Latest: Witness say shooter watched party in dark coat

A police officer stands outside the pool area at an apartment complex Monday, May 1, 2017, where a deadly shooting occurred Sunday. (AP Photo/Julie Watson) (The Associated Press)

People walk near the scene Monday, May 1, 2017, in San Diego, at the La Jolla Crossroads apartments where a deadly shooting took place on Sunday. Peter Selis, despondent over a recent breakup, opened fire at a poolside birthday party and phoned his ex-girlfriend as he kept shooting strangers, police said Monday. (K.C. Alfred/The San Diego Union-Tribune via AP) (The Associated Press)

Demetrius Griffin, who was a guest at a Sunday, April 30, 2017, poolside birthday party at which a gunman opened deadly fire, stands outside the San Diego complex as he describes what he saw on Monday, May 1. He said Peter Selis sat on a pool chair during most of the rampage, calmly shooting guests at the party. "He didn't stand up. He sat the whole time. Even when he reloaded his magazine, he sat in his chair," said Griffin. (AP Photo/Julie Watson) (The Associated Press)

The Latest on a shooting at a San Diego apartment complex (all times local):

11 a.m.

A witness says a man who shot six black people and one Latino man at a San Diego apartment pool party had caught the attention of guests because he was sitting in a chair wearing a heavy black coat despite the warm weather.

Demetrius Griffin says he was attending his friend's birthday celebration on Sunday and noticed the man silently watching the gathering for more than a half-hour.

At one point the guest of honor invited the man to join the party. Griffin says the man pulled out a handgun and shot his friend in the torso.

He says the man remained seated as he calmly fired into the crowd of about 40 people, striking six other guests including a woman who later died.

Police fatally shot the suspect, 49-year-old Peter Selis.

Chief Shelley Zimmerman said investigators don't yet know why Selis, who was white, started shooting.