阿萨德称英国在叙利亚的空袭是非法的

Syrian President Bashar al-Assad has criticized Britain's entrance into the U.S.-led coalition attacking Islamic State militants in Syria, saying the airstrikes are illegal and will fail.

In an interview published in Britain's Sunday Times, Assad said Islamic State cannot be defeated by airstrikes alone, and that the only strikes that have been effective are those Russia has done since launching its Syrian campaign in September.

He has long criticized Western governments and others in his region who support moderate rebel fighters, and complained that the coalition airstrikes are a violation of his country's sovereignty.  The U.S. and others in the West say Russia's airstrikes have largely focused on rebels and not Islamic State fighters.

Assad said in the interview there has been no moderate opposition during his country's conflict that began in March 2011, but rather only "extremists."  The Syrian government has routinely referred to rebels as "terrorists" since the crisis expanded from peaceful protests to multi-party civil war.

Assad said if Western and regional support for terrorists ends, then it will take "a matter of months" to end the conflict.

Britain expanded its involvement in the U.S.-led coalition last week from conducting airstrikes solely against Islamic State targets in Iraq to bombing the militants in Syria as well after Prime Minister David Cameron lobbied his parliament for approval.