"The shooter or shooters are still on the run" either in or around the mall, police said.
An 18-year-old who authorities say was "obsessed" with mass shootings opened fire on a crowd in a Munich shopping mall, killing nine people and wounding 16 on Friday.
The shooting spree ended when authorities say the German-Iranian man, who reportedly has no links to ISIS, killed himself.
"Documents were found about mass shootings," Munich police chief Hubertus Andrae told reporters about the subsequent investigation into the unnamed gunman. "The perpetrator was obviously obsessed with the issue."
Video footage captured at least one of the gunmen on film.
Video of shooter shooting at people. #munich #münchen pic.twitter.com/Pl6jhrVXMH
— uprising (@johndeconner) July 22, 2016
Read: How to Use a Belt to Barricade a Door During a Shooting
Munich police warned residents to avoid public places and said a large operation is underway. They said the scene on the ground remained highly fluid.
“The situation is still completely confusing,” Thomas Baumann, a deputy spokesman of the Munich police, told Germany's dpa news agency, according to The New York Times.
The attack began at about 6 p.m. local time at a McDonald’s, Munich police told dpa. Police said on Facebook that witnesses saw three people with guns. At least one woman said a gunman came out of the bathroom and targeted children while they ate, according to CNN.
Footage taken outside the mall showed people streaming into the streets.
Shooting in #Munich shopping mall #OEZ!! People running away to seek shelter!! pic.twitter.com/PB189s6RQy
— Thamina Stoll (@thaminastoll) July 22, 2016
"Many shots were fired, I can't say how many but it's been alot," an employee said, according to Reuters. "All the people from outside came streaming into the store and I only saw one person on the ground who was so severely injured that he definitely didn't survive."
On Friday, President Obama issued a statement of solidarity to the German people.
"We don't yet know exactly what's happening there, but obviously our hearts go out to those who may have been injured," he said from the White House. "We are going to pledge all the support they may need."
Read: Brave Cop Told Trapped Workers: 'I'll Take A Bullet Before You Do'
It comes just days after a 17-year-old Afghan used an ax and knife to wound four people on a train in Wuerzburg Monday. The attacker was shot dead but all of his victims survived. One man remains in life-threatening condition at a local hospital.
ISIS claimed responsibility for the train attack.
Watch: How to Use a Fire Extinguisher in an Attack
