Ian Tomlinson worked in a newsagents in the City of London
A man who died during protests around the G20 summit in London suffered a fatal heart attack, police have said.
Ian Tomlinson, 47, collapsed on Wednesday evening while dozens of protesters were gathered near the Bank of England in the City of London.
Mr Tomlinson, who lived in the area, was returning home from his work at a nearby newsagents when he collapsed.
He was treated at the scene but medics were unable to save him and he was pronounced dead in hospital later.
The City of London Police said: "A post-mortem examination found he died of natural causes.
"[He] suffered a sudden heart attack while on his way home from work.
"The family thanked all the people who rushed to Ian's aid when he collapsed and said how grateful they are for all the efforts that were made to help him."
The Independent Police Complaints Commission is looking into Mr Tomlinson's death.
A Metropolitan Police spokesman said at the time that officers treating him had bottles thrown at them by protesters.
But there were also claims his treatment was delayed by the presence of the police cordon around the protest area.
There were demonstrations near the venue of the G20 summit and in the City on Wednesday and Thursday.
Several hundred people gathered near the ExCel centre in docklands and outside the Bank of England.
Police said there were more than 120 arrests related to the G20.