Syrian security forces have kept heavy weapons in cities in breach of a UN-brokered cessation of hostilities, but the government and opposition both have committed truce violations, a top UN official said yesterday.

The 24 unarmed military observers now in Syria have seen Howitzer guns, armored personnel carriers and other weaponry in cities, UN peacekeeping chief Herve Ladsous told a press conference at UN headquarters.

Mr Ladsous insisted, however, that the monitors were having a “visible impact” in cities where they have been allowed to go.

Withdrawing weapons and troops from Syrian cities was a key part of a six-point peace plan agreed by President Bashar al-Assad and UN-Arab League envoy Kofi Annan. Syria has told the UN that weapons have been pulled back.

“Regarding the heavy weapons, yes, our military observers do see a number of APCs, for instance, they see a number of Howitzers and other military equipment in most places where they are,” Mr Ladsous said.

Syria has told the monitors that the armoured carriers have been disarmed but this has not been verified, Mr Ladsous added.

The UN Security Council has approved a 300 strong force to monitor the cessation of hostilities which started on April 12 but has barely held.

Mr Ladsous said only 150 monitors have been promised by UN member states so far and that Syria has refused visas for three monitors.

He refused to give the nationalities of the three, but at least one of the officers is already in Damascus serving in the UN Truce Supervision Organization.

“If there is not sufficient cooperation on (visas) from the Syrian authorities, of course we will report to the Security Council,” Mr Ladsous warned.

Despite the slow pace of finding monitors, the UN official said he was “confident” that the full 300 force would be found and would be in Syria by the end of May.

Western nations have expressed strong doubts, however, that Mr Assad’s government will stick to the six-point plan proposed by Mr Annan.