Authorities in Copenhagen say the dead man believed to be responsible for yesterday's shootings was a 22-year-old born in Denmark. Unconfirmed reports from Danish media have named him as Omar Abdel Hamid el-Hussein.

According to The Guardian, the gunman was already known to police "because of past violence, gang-related activities and possession of weapons."

Early Sunday morning, officers shot and killed the suspect after they say he opened fire on police. He is believed to be the same man who shot four people at a free speech debate in Copenhagen on Saturday and three more at a synagogue just hours later.

In December, el-Hussein was reportedly convicted of stabbing another passenger on a commuter train in 2013.

[Image via Copenhagen Police/Twitter]