- Australia Prime Minister refuses to comment on the claims, but says his country turns around "illegal boats"
- U.N. refugee agency says it learned of payments from passengers on one boat
The boat -- carrying 65 migrants from Sri Lanka, Bangladesh and Myanmar -- was intercepted by the Indonesian navy after turning back on May 31, the UNHCR said.
The migrants were transferred to an Indonesian customs vessel for four days before being sent on two boats to Indonesia, the UNHCR added, after speaking to some of the passengers.
Australia did not deny the payment and Prime Minister Tony Abbott went on the defensive Friday when asked about the claim. Abbott refused to "comment on operational matters."
Abbott said in an interview with Radio 3AW that Australia is "determined to ensure that illegal boats don't get to Australia. We will do whatever is reasonably necessary to protect our country from people smuggling and from the effects of this evil and damaging trade that costs lives."
When pressed further about whether Australia paid smugglers illegally transporting migrants, Abbott replied "what we do is we stop the boats by hook or by crook because that's what we've got to do and that's what we've successfully done."
He said he didn't want to discuss details about the interception, but said it was necessary and indicated it has been done more than once.
"It's difficult and at times I suppose it's dangerous work, but we deal with it and we've stopped the boats," he said.
Abbott also refused to confirm if Australia would investigate the payment claim.
Meanwhile, the Australian Customs and Border Protection Service said that during the month of May "there were no illegal maritime arrivals."