A website tracking the movements of the Coastguard helicopter shows the part of the lough that is being targeted in the search and rescue operation.
More top news
Another bitterly cold day after a freezing, frosty morning, not much change this afternoon
Nazanin Zaghari-Ratcliffe's five-year jail sentence is confirmed despite her husband's campaign to bring her home.
A man who was filmed swallowing a goldfish for a drinking challenge is facing jail.