A Muslim man comforted an elderly Jewish woman and the pair prayed together at a floral tribute in the centre of Manchester in a symbol of the city's unity following a suicide bomb attack which killed at least 22 people.

Sadiq Patel came and comforted Renee Rachel Black, who was visibly upset, and prayed next to her beside a display of flowers in Albert Square, where a vigil was held on Tuesday for victims of Monday night's attack at an Ariana Grande concert.

He then helped her away, linking arms with her and carrying her chair in his other hand.

It came as British police said they were investigating a network in their probe into the Manchester suicide bombing that killed 22 people on Monday, the head of Greater Manchester Police said.

Muslim man comforts elderly Jewish woman in symbol of Manchester unity Show all 4 1 /4 Muslim man comforts elderly Jewish woman in symbol of Manchester unity Muslim man comforts elderly Jewish woman in symbol of Manchester unity A Jewish woman named Renee Rachel Black and a Muslim man named Sadiq Patel react next to floral tributes in Albert Square REUTERS Muslim man comforts elderly Jewish woman in symbol of Manchester unity A Jewish woman named Renee Rachel Black and a Muslim man named Sadiq Patel react next to floral tributes in Albert Square in Manchester, Britain May 24, 2017. REUTERS/Darren Staples - RTX37DOD REUTERS Muslim man comforts elderly Jewish woman in symbol of Manchester unity A Muslim man named Sadiq Patel comforts a Jewish woman named Renee Rachel Black next to floral tributes in Albert Square in Manchester, Britain May 24, 2017. REUTERS/Darren Staples - RTX37F09 REUTERS Muslim man comforts elderly Jewish woman in symbol of Manchester unity A Muslim man named Sadiq Patel and a Jewish woman named Renee Rachel Black walk by floral tributes in Albert Square in Manchester, Britain May 24, 2017. REUTERS/Darren Staples - RTX37DOG REUTERS

"I think it's very clear that this is a network that we are investigating," Chief Constable Ian Hopkins told reporters.

"And as I've said, it continues at a pace. There's extensive investigations going on and activity taking place across Greater Manchester as we speak.