The federal government is trying to find out if any Australians have been caught up in a blast in the north England city of Manchester.
The High Commission in London is making “urgent inquiries”, the Department of Foreign Affairs and Trade confirmed.
There are reports of a “number of fatalities” but no further details.
The emergency happened at the end of a concert by US performer Ariane Grande at Manchester Arena.
Australia’s counter-terrorism coordinator Terry Sheehan says the high commission in London is seeking to find out if any Australians were injured or killed in the Manchester arena attack.
Mr Sheehan told a Senate committee in Canberra on Tuesday UK police had advised Australian authorities there were 19 people dead and 50 injured in the attack.