Acting on a tip-off, a police team nabbed the accused when they were planning to execute a robbery and seized three knives and some master keys from them, a police officer said.
The accused, aged between 25 and 30 years, were identified as Vinay, Sonu alias Pintu, Kuldeep and Deepak, all residents of Ghaziabad.
The accused admitted to their involvement in several robberies in the area, the officer said, adding they usually looted houses locked from outside.
Further interrogation is on to know about their accomplices, the officer added.