UPDATE 1-France's Fabius: Syria chemical arms use unacceptable

(Adds Fabius on Assad's future, background)

PARIS, July 24 (Reuters) - Any use of chemical weapons by

Syrian government forces would be unacceptable, French Foreign

Minister Laurent Fabius said on Tuesday.

Syrian Foreign Ministry spokesman Jihad Makdissi,

acknowledging for the first time that his country had chemical

and biological weapons, said on Monday the Syrian army would not

use chemical weapons to crush rebels but could use them against

forces from outside the country.

"Any use of chemical arms is completely unacceptable.

President Obama made statements to this effect and so have

others... These weapons are under strict surveillance by the

international community, " Fabius told France 2 television.

Fabius also said Syrian President Bashar al-Assad was bound

to fall at some point and the Arab League offer of a safe exit

would not save him from punishment.

Arab foreign ministers on Sunday offered Assad a "safe exit"

if he stepped down - an offer followed by a fierce

counter-offensive by Syrian government forces, reflecting

Assad's determination to keep power against the 16-month-old

rebellion against his rule.

"The Arab League has made this offer but I think that, in

the long term, all dictators must pay for their crimes," Fabius

told France 2. "In the end, for him and other dictators, there

will be no impunity... Assad will fall, it is only a matter of

time."

"The fall of Bashar al-Assad must not bring about a

persecution of minorities," Fabius added.

Several Western states expressed alarm at Syria's

acknowledgment that it had chemical and biological weapons and

would use them against any foreign intervention, though not

against Syrian rebels.

The Syrian announcement followed a week of unprecedented

fighting in the capital, Damascus, and a bomb attack that killed

four of Assad's closest advisers including his brother-in-law.

(Reporting By Nicholas Vinocur, editing by Tim Pearce)