Police are investigating on suspicion of attempted murder.

British police on Monday blocked a street in central London near the residence of British Prime Minister Boris Johnson. According to the police, its officers arrested a 29-year-old man.

Whitehall Street, where several UK government departments are located, including the Ministry of Finance, the Ministry of Foreign Affairs and the Ministry of Defense, and which leads to the office building and the Prime Minister’s residence on Downing Street, was cordoned off by police.

Police said they launched an investigation after the incident that took place on Monday morning.

“At about 08:50, a 29-year-old man armed with a knife attacked two police officers of the Ministry of Defense. A taser was used, and the man was detained by employees. There were no reports of injuries,” the London police said in a statement.

“He was arrested on suspicion of attempted murder and possession of firearms and remains in custody at the central London police station. The incident is not considered to be related to terrorism,” the document says.