A van rammed into a group of pedestrians outside a London mosque early Monday, injuring 10 people in what British Prime Minister Theresa May called a “sickening” terrorist attack on Muslims.

The vehicle swerved into a group of people shortly after midnight as they left prayers at the Muslim Welfare House and the nearby Finsbury Park Mosque in north London, one of the biggest in Britain.

One person died at the scene, but it was not clear if he died as a result of the attack or from something else.

Police will assess the security of mosques and provide any additional resources needed ahead of celebrations marking the end of the holy month of Ramadan, May announced.

“This was an attack on Muslims near their place of worship,” she said in a televised address.” And like all terrorism, in whatever form, it shares the same fundamental goal. It seeks to drive us apart, and to break the precious bonds of solidarity and citizenship that we share in this country. We will not let this happen.”

London Mayor Sadiq Khan called the incident “a truly horrific terrorist attack on our city” and Prime Minister Theresa May said it was “an attack on Muslims near their place of worship.”