Police have arrested a man who barricaded himself into a flat with a gun and “threatened to harm himself”.
Armed police sealed off Narrow Street, near Barleycorn Way, in Limehouse about 11am on Monday amid reports of a gunman on the loose.
They stormed into the home and arrested the suspect after a tense two-hour standoff.
Parents at Cyril Jackson Primary School were being advised to pick up children from different exits on Grenade Street to the north and south of the police cordon.
A Met spokesman said: “Police were called to a property in Barleycorn Way, E14, at 11.00hrs on Monday, 22 May to reports of a concern for welfare.
“It was reported there was a man inside the property with a firearm who was threatening to harm himself.
“Officers entered the building and a firearm was recovered and the man was arrested on suspicion of possession of a firearm.”