Nesma seif write
The sister of the gunman is among nine people killed in the attack in Dayton, Ohio, police said on Sunday.
Megan Betts, 22, was confirmed as being among the dead at a news conference at which the victims were named.
At least 27 people were injured in the shooting, the second in the US within 24 hours. At least 20 others were killed in El Paso, Texas, hours before.
Police confirmed they killed the Dayton gunman at the scene within a minute of him opening fire.
Officials said they were still investigating possible motives, but said all the deceased were killed in the same area.
“It’s hard to imagine that there was much discrimination in the shooting… it happened in a very short period of time.”
The Gun Violence Archive, which categorises mass shootings as four or more people shot or killed, says there have been 251 so far this year.
Police said all the fatalities happened outside in the street.
Assistant Police Chief Matt Carper told reporters that officers managed to take down the gunman.
“Our people are very well trained for a situation like this,” he said, adding it was “very fortunate that the officers were in close proximity”.
Nan Whaley told reporters she was “amazed” by the quick response of the officers which she said prevented further deaths, but also stressed it would be a “very, very difficult time” for families of victims.
“As a mayor, this is a day that we all dread happening,” she said. “What’s very sad is I’ve got messages from mayors across the country – it’s sad that we’ve all gone through it.”