Essex Police have arrested a man outside a prayer centre in Braintree on suspicion of carrying an offensive weapon and attempted arson.
A 43-year-old man remains in custody after reportedly walking into the building with a knife in Silks Way.
The Braintree MP Brooks Newmark tweeted that he met religious leaders last night and thanked the police for their quick response. No one was injured in the incident.
Essex Police say they are continuing to investigate the full circumstances around the incident.