People at the scene shouted “have you got a faster taxi today?” and “how can you be so quick today?”
It marks the latest difficult encounter for Mrs May in the wake of major disasters, with her response to last week’s Grenfell Tower fire having been heavily criticised.
She vowed on Monday that mosques would be given extra protection by police and said that more would be done to crackdown on Islamophobia, with a package of measures to tackle extremism expected in the Queen’s Speech on Wednesday.
“Extra police resources have already been deployed to reassure communities, and the police will continue to assess the security needs of mosques and provide any additional resources needed,” she said.
She condemned the incident as “every bit as sickening” as the recent atrocities in London and Manchester.