Police were called to Creasey Close in Hornchurch this morning following reports of a man acting aggressively.
A Met police spokesperson said: “Police were called at around 10:55hrs on Monday, 16 March to reports of a man acting aggressively on Creasey Close, Havering.
“By the time of police arrival, the man had taken ill and was treated at the scene before being taken to hospital.
“We await an update on his condition.”
No arrests have been made.