BEIRUT - At least eight people, mostly Syrian military personnel, were killed and about 100 wounded on Monday in bomb blasts at security buildings in Idlib, state media said, as a bombing campaign intensified against government targets.
Twin explosions, the latest to disrupt a shaky UN truce, blew fronts off nearby buildings and left craters in roads, according to images on state television which showed people at the scene in the restive northwestern city condemning the rebels who are fighting to oust President Bashar Assad.
State television said both blasts were suicide bombings.
A prominent human rights activist said they appeared to target local headquarters of intelligence services for the air force and the army, two of the many security agencies that have helped keep the Assad family in power for four decades.
The activist at the British-based Syrian Observatory of Human Rights put the death toll at over 20. Syria bars most independent journalists, hindering verification of such figures.
State television said monitors from the United Nations team sent in to oversee the 18-day-old ceasefire were visiting the scene in Idlib. Foreign Ministry spokesman Jihad Makdissi said the head of the monitoring mission, Norwegian general Robert Mood, was being briefed on "violations by armed opposition".
The United Nations says security forces have killed 9,000 people in the uprising, which started as peaceful mass protests inspired by rebellions elsewhere in the Arab world but which is becoming an increasingly bloody guerrilla insurgency.
Damascus says 2,600 from its forces have died at rebel hands and has accused the United Nations of turning a blind eye to "terrorist acts" committed by those fighting for the removal of Assad, who succeeded his late father, Hafez Assad, in 2000.
Bombing campaign against Assad forces ongoing
Although the rebels are far from a unitary force, their tactics in general appear to be shifting from small-scale ambushes on checkpoints and military patrols to high-impact assaults on infrastructure and symbols of the Assad state.
"We are starting to get smarter about tactics and use bombs because people are too poor and we don't have enough rifles. It is just no match for the army. So we are trying to focus on the ways we can fight," said one anti-Assad fighter who claimed to be in command of a militia unit.
On Saturday, gunmen in inflatable dinghies killed several people in a seaborne assault on a military unit near the port of Latakia, and militants fired rocket-propelled grenades at the Central Bank in Damascus on Sunday, causing slight damage.
An Islamist group calling itself al-Nusra Front has claimed responsibility for a suicide bombing that killed at least nine people, most of them security officials, in Damascus on Friday.
Also Friday, authorities in Beirut seized a ship carrying a large consignment of weapons from Libya, including rocket-propelled grenades and heavy caliber ammunition, that could have been smuggled into Syria.
International observers have "huge task" ahead of them
UN ceasefire monitors are gradually trickling in to Syria, with 30 out of a planned 300 now on the ground. Their Norwegian commander, Mood, a veteran of previous Middle Eastern peace missions, acknowledged the huge task awaiting the unarmed mission but said he was confident it could make headway.
"We will be only 300 but we can make a difference," he told reporters on his arrival in the Syrian capital. "Thirty unarmed observers, 300 unarmed observers, even 1,000 unarmed observers cannot solve all the problems," he said.
An activist in the restive central city of Homs, speaking via Skype, said violence had dropped sharply since the observers deployed a permanent two-man team there last week.
"There are still violations but the shelling and mortar fire has stopped," Karam Abu Rabea said. "We have insisted that the observers stay in Homs because we know if they leave (the attacks) will continue."
Despite the relative calm in Homs, activists said at last 39 people were killed across the country on Sunday, including civilians, security forces and rebels.
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