A Lashkar-e-Tayiba militant was arrested from southwest Delhi on Wednesday night, the police said on Thursday.
On a tip off, Special Cell of the Delhi Police arrested Abdul Karim, wanted in connection with some cases in Poonch district of Jammu and Kashmir, from Mahipalpur area, they said.
Karim, a resident of Mendhar in Poonch, was suspected to be trying to set up a base for the outfit in the capital, the sources said.
He was staying in a rented house and had introduced himself as a student.
The sources said he was being interrogated.