Malaysia's opposition has fired an outspoken lawmaker who broke ranks with his party in a religious dispute over the use of the word "Allah" by non-Muslims, party officials said on Sunday.

Malaysian opposition leader Anwar Ibrahim today denounced sodomy charges against him claiming that they were trumped up by his rivals as his accuser gave an explicit testimony during the trial that could jeopardise the former deputy premier's political career.

Malaysian prosecutors charged three Muslim men on Friday in the firebombing of a church - the first suspects in a string of assaults on places of worship amid a dispute over whether non Muslims can refer to God as "Allah."

In the wake of a spate of attacks on churches in Malaysia following a row over the use of the word "Allah" by non-Muslims, Prime Minister Najib Razak on Monday warned of strict action against those engaged in acts of vandalism.

Firebombs were thrown at two more churches in Malaysia early on Sunday, the latest in a series of assaults on Christian houses of worship following a court decision that allows non-Muslims to use "Allah" to refer to God.