Hamas spokesman Sami Abu Zuhri defended on Saturday politburo chief Khaled Mashaal's controversial speech slamming Fatah movement and Palestinian President Mahmoud Abbas.

"We, the Hamas movement, stress on the importance of Mashaal's remarks which came to make clear what challenges and obstacles the Palestinian government faces," Abu Zuhri said in a press release.

Abu Zuhri said that Mashaal wanted to say the truth "before our people and nation."

The Hamas spokesman made the remarks shortly after Fatah denounced on Saturday the speech made by Mashaal on Friday in Damascus.

Addressing a gathering marking the anniversary of the death of Hamas spiritual leader Ahmed Yassin held in Syrian capital of Damascus on Friday, Mashaal accused Abbas and his Fatah movement of corruption and plotting against Hamas.

The controversial speech joined another dispute between the Hamas-led government and Abbas as a decision to form a new security force was vetoed by Abbas, who termed it as illegal and against constitutional rules.

In an earlier statement, Abu Zuhri accused some "internal elements" of joining a conspiracy of trying to topple the Hamas-led cabinet.

Hamas came to power in late March, but has since been facing internal and external pressure, which pushes the newly-installed cabinet on the brink of bankruptcy.