(Corrects number of Australian dead to 92 from 88 in paragraph 6)

CANBERRA, July 9 (Reuters) - An Australian warning of possible terrorist attacks in the final stages of planning in Indonesia was based on intercepted militant communications, Foreign Minister Alexander Downer said on Monday.

"We don't have any information designating a specific target or for that matter a specific time of a terrorist attack, but we have a constant flow of information about possible terrorist activity in Indonesia," Downer told Australian radio.

"There is constant (extremist) chatter," he said, adding that the arrest last month of top Jemaah Islamiah leader Abu Dujana had also lifted tensions.

In an upgraded travel advisory at the weekend, the Australian Department of Foreign Affairs and Trade said terrorists were actively planning attacks that could take place at any time, including the holiday island of Bali.

Indonesian police said the security situation in the country at the moment was favourable.

A total of 92 Australians have been killed in attacks blamed on the Southeast Asia militant group Jemaah Islamiah in Bali between 2002 and 2005. In 2002, bombs ripped through two Bali nightclubs, killing 202 mostly-foreign holidaymakers.

Prime Minister John Howard said the latest warning had not been issued lightly, especially given the warming relationship between Australian and Indonesia.

"We only give these warnings on strong intelligence. We act on the advice of our agencies," Howard told Australian television. "We are the last country in the world to want to say anything unnecessarily serious about Indonesia."

Australia is probing whether attempted bombings in London and Glasgow last week could be linked to home after questioning at least six Indian doctors, one of whom remains in police custody.

Howard on Sunday fast-tracked changes to immigration screening which match intelligence data with a person's travel and financial history to determine if they might be a security threat to Australia.

Australia has never suffered a terrorist attack on home soil.

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