Syrian deputy foreign minister stressed Tuesday Syria's resolution and readiness to implement the UN-backed six-point peace plan brokered by Kofi Annan, accusing the opposition of not willing to abide by the plan which was meant to bring the 15-month unrest in Syria to a close.

Talking to reporters Tuesday, Faisal Mikddad stated that Syria hasn't violated Annan's plan that calls for a cease-fire from all parties.

The UN-brokered cease-fire technically went into effect on April 12, but hasn't taken hold as violence continued unabated.

"During this time of (ceasefire), Syria has not done a single violation of Annan's plan," Mikddad said, contending that the other party "has not committed to a single point."

"This means that there is a decision not to implement Annan's plan and make it fail by the armed groups and the opposition," he added.

"So we think that Mr. Annan will make all efforts, in the next few days and weeks, to convince the countries that are financing and supporting those terrorist groups to stop lying about wanting Annan's plan to succeed."

On the investigation committee set up by the Syrian government to probe the massacre that killed over 100 people in Syria's central village of Houla last Friday, Mikddad said "the investigation will take three days and I think that the concerned parties are working on this."

Annan arrived in Syria Monday to discuss the prospect of his peace plan with Syrian officials. Upon arrival, Annan met with Syrian foreign minister.

On Tuesday, the UN-Arab League joint special envoy met with Syrian President Bashar al-Assad, but the content of the discussion was not immediately published.

Annan said Monday that he expects to have "serious and frank" discussions with Assad.