Manchester attack: Police hunt 'network' behind bomber

A fifth man has been arrested in the UK over Monday’s bombing at a pop concert at Manchester Arena, as police said they were investigating a “network”.

Suicide bomber Salman Abedi killed 22 - including children - and injured 64 outside an Ariana Grande gig.

The UK terror threat level is now at its highest level of “critical”, meaning more attacks may be imminent.

In Libya, the bomber’s father, Ramadan, and younger brother, Hashem, have been arrested, Reuters is reporting.

Hashem, 20, was reportedly arrested in the capital Tripoli on suspicion of links with so-called Islamic State, according to Reuters.

Older brother, Ismael, was detained in Chorlton, south Manchester, on Tuesday.