Four people have been injured in a knife attack at the Arndale Centre in Manchester city centre.

A man, in his 40s, is being held on suspicion of terror offences after three people were stabbed and a fourth was hurt.

The centre was evacuated after the attack at about 11:15 BST.

Counter-terror officers are "keeping an open mind" about the motive for the attack, Greater Manchester Police (GMP) said.

BBC