Indonesian police say they will ask relatives of wanted Islamist Noordin Mohamed Top for DNA to confirm if he was killed in a shoot-out.
Noordin was reportedly in a house in central Java which police stormed yesterday after a 17-hour siege.
Malaysian-born Noordin is suspected of orchestrating the Bali bombings of 2002 and other major attacks.
Following the storming of the house in central Java, a body was removed but police did not confirm media reports that it was that of Noordin.
Police chief Bambang Hendarso Danuri said: "We are not saying yet who was killed. We have to conduct DNA tests first." He confirmed that only one person had been killed in the operation, despite earlier reports that more bodies had been taken from the house.
Police said they had surrounded the house following the arrest on Friday of several suspected militants loyal to Noordin.
After a long siege, members of Indonesia's élite anti-terrorism unit entered the remote house just before 10am yesterday by blowing in one of the doors.
Several minutes later, after further explosions and exchanges of gunfire, officers were seen leaving with their helmets off and shaking hands with each other.
Noordin – one of southeast Asia's most wanted terror suspects – is believed to have been involved in all the major attacks carried out in Indonesia, including the bombings of two Jakarta hotels last month that killed nine people and injured scores of others.