Four men have been arrested in the Belgian capital - which is on lockdown following 'precise' information about a security threat.

The Brussels metro has been closed and people have been advised to stay away from crowded areas.

Some of the attackers who killed 130 people in Paris lived in Brussels - the leading suspect Salah Abdeslam is believed to have gone back to Belgium.

He is now the focus of a huge manhunt.

Sky's Enda Brady has the latest:

Meanwhile - Belgium remains on its highest terror alert this evening.

The Belgian prime minister Charles Michel says the immediately took action following new information overnight: