Four masked men allegedly set fire to parked motorcycles in Delhi's Jahangirpuri after a resident reported drug abuse in a neighbourhood park, police said.
Three vehicles were damaged in the fire, with no injuries reported, according to police.
CCTV footage showed four masked youths moving around the locality late at night, police said.
Residents alleged the incident may be linked to recent complaints made to police about drug abuse in a public park in the area.
Police have registered an FIR under Section 326(f) of the Bharatiya Nyaya Sanhita (BNS) and are analysing CCTV footage to identify and apprehend those involved.