The trio travelling in a van was intercepted at Kharabi Check Post under Darathi Police Station in Umarkhed tehsil in the wee hours of today, police said.
During questioning police found something suspicious about their behaviour. They searched the van from where they found a pistol, 60 live cartridges, three mobiles and a few detonators, SP Akhilesh Kumar Singh said.
All these items and the van (registered in Andhra Pradesh) were seized and the trio was placed under arrest, he said, adding that the accused were on their way to Pusad taluka in the district.
A team of Anti-Terrorism Squad from Yavatmal has gone to Umarkhed to investigate the matter, police sources said.