Four people were killed and two people injured in a shooting at a hospital in the eastern Czech city Ostrava.

"At the scene of the event are four dead and two seriously injured people," police tweeted Tuesday. "Police are intensively searching for the perpetrator. We ask the public for cooperation."

The incident happened just after 7 a.m., the Czech Interior Minister Jan Hamáček also tweeted. He also confirmed the fatalities and added that police and emergency response units were in attendance.

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CNN reached out to police for further information on the motive and context around the attack but they declined to comment. They also would not comment on the identity of the victims.

Ostrava is an industrial and mining city in the east of the country. It is on the Czech Republic's rust belt, close to the border with Poland.

CNN