A man has been arrested on suspicion of attempted murder amid reports a suspect was seen wielding “a massive machete” at a railway station in south London.
Police were called to Tulse Hill station during evening rush hour just after 18:30 GMT, British Transport Police (BTP) said.
In the course of the arrest a Taser was discharged, BTP said in a statement.
The man, 59, was also arrested on suspicion of possessing an offensive weapon.
One witness @Vikjas85 tweeted: “Man at Tulse Hill Station with a massive machete just been tasered by the police.”
BTP said there were no reported injuries and the suspect has been taken into custody for questioning.
The incident was not believed to be terror-related, it added,
The arrest comes on the day Sadiq Khan announced Lambeth Council leader Lib Peck as the director of his new Violence Reduction Unit.