According to official sources, the incident took place when Abdul Razzak, Mohammed Sadiq and Rafaqat Ali were being escorted to a hospital for treatment by Meghalaya police personnel.
Delhi Police spokesman Rajan Bhagat said, "The trio managed to slip out of the clutches of Foreigners Regional Registration (FRRO) officials at the G B Pant hospital in central Delhi."
Joint Commissioner of Police Karnal Singh said, "The three terrorists, who had completed their jail terms three months ago, were arrested with 50 kg heroin in 17 kg of RDX explosive."
Home Ministry officials said a red alert was sounded in Delhi and adjoining areas to nab the fleeing terrorists.
The three were arrested on Oct 30, 2000, from Rothak and Delhi.