Jerusalem: Israeli President Shimon Peres warned on Sunday that an attack on Iran is becoming increasingly likely, days before a report by the UN's nuclear watchdog on Iran's nuclear programme is due.

"The possibility of a military attack against Iran is now closer to being applied than the application of a diplomatic option," Peres said.

"We must stay calm and resist pressure so that we can consider every alternative," he added. "I don't think that any decision has already been made, but there is an impression that Iran is getting closer to nuclear weapons."

"The intelligence services of the different countries that are keeping an eye on (Iran) are worried and putting pressure on their leaders to warn that Iran is ready to obtain the nuclear weapon," he said.

In France meanwhile, French Foreign Minister Alain Juppe warned that an attack on Iran would be disastrous.

"We have imposed sanctions that continue to expand, we can toughen them to put pressure on Iran," Juppe told Europe 1 radio.

"We will continue on this path because a military intervention could create a situation that completely destabilises the region," he said.

"Everything must be done to avoid the irreversible."

In recent days, speculation in Israel has grown about the possibility of a pre-emptive strike against Iranian nuclear facilities, with Haaretz newspaper reporting that Prime Minister Benjamin Netanyahu and Defence Minister Ehud Barak were seeking cabinet support for an attack.

(Agencies)