Officials believe the suspect may not have acted alone and spent days casing out the scene of the attack.

Tusk says Poland is preparing for "various" scenarios after media reports of a planned Russian attack.

Forecasters are warning of further extreme temperatures on the continent in the next few days.

The disaster has overwhelmed local services, with bodies put outside or in tents for identification.

Ali Khamenei's body will lie in state in Tehran's Grand Mosalla from Friday ahead of days-long funeral events.

A doctors' group says it "borders on madness" that patients will have to obtain the note in person.