An explosion has ripped through a block of flats in east London causing the building to partially collapse.
Two men have been arrested over the blast which happened at Bridge Point on Ardleigh Green Road in Hornchurch shortly after 17:00 GMT on Monday, BBC reports.
Firefighters said they had rescued 25 people as residents were evacuated from the building.
The arrested men, who both required hospital treatment, are being held on suspicion of arson.
London Ambulance Service said four people had been treated at the scene and taken to hospital, while a woman and a child trapped on the building's second floor had escaped down a fire brigade ladder.
A Havering Council spokesman said the explosion had happened in a ground-floor flat. He said 41 properties had been evacuated and most residents went to a local McDonald's restaurant while alternative accommodation was found.
