A bomb attached to a fuel truck exploded on Wednesday outside a Damascus hotel where U.N. observers are staying in the Syrian capital, wounding at least three people, Syria’s state TV reported.

Syrian Deputy Foreign Minister Faisal Mekdad toured the area of the blast and said none of the U.N. staff was hurt. The explosion occurred as U.N. humanitarian chief Valerie Amos was in the Syrian capital but her team is believed to be staying at a different hotel.

The blast was the latest in a series of explosions that have hit Damascus in the past months as clashes between government troops and rebels reached the Syrian capital, which had been relatively quiet since an uprising against President Bashar Assad’s regime erupted in March last year.

Wednesday’s explosion took place near a parking lot used by the Army command in Damascus, about 300 meters away, the state TV said.

But according to an Associated Press reporter at the scene, the blast went off inside a different parking lot, one belonging to a military compound and not the military command. The lot is near the Dama Rose Hotel, popular with the U.N. observers in Syria and where many of the mission staff are staying.

The hotel was slightly damaged, with some of its windows shattered. A labour union building across from the hotel was also damaged and black smoke was seen billowing high into the sky before the fire was extinguished. Several fire engines arrived shortly after to fight the blaze, which took less than an hour to put out.

U.N. officials in Damascus had no immediate comment when contacted by the AP. None of the about a dozen U.N. vehicles parked near the hotel were damaged.

“This is a criminal act that shows what kind of attacks Syria is being subjected to,” Mr. Mekdad told reporters at the scene. “Such explosions will not affect Syria.”

“I confirm that we are with the U.N. and we will do all we can to guarantee their protection so that they carry out their role,” he added.

It was not immediately clear who was behind Wednesday’s explosion or what was the intended target. There have been several high-profile bombings in the Syrian capital.

Elsewhere in Syria on Wednesday, activists reported shelling and clashes in the northern city of Aleppo, Syria’s largest, where rebels took over several neighbourhoods over the past weeks.

The Britain-based Syrian Observatory for Human Rights said the rebels were trying to take over a key dam in the northern town of Manbij, just east of Aleppo. It added that the army was using helicopter gunships in the battles near the dam, on the strategic Euphrates River.

The Local Coordination Committees, anther activist group, reported violence in the eastern province of Deir el-Zour, northwestern region of Idlib, Daraa to the south and in Damascus suburbs.

The LCC said there was also fighting near a border crossing with Turkey that the rebels had captured last month. A local official in the Turkish border town of Reyhanli said clashes could be heard coming from the region on Tuesday but that the situation had calmed by Wednesday morning. The official spoke on condition of anonymity because he was not authorised to talk to the media.

Turkey’s state-run Anadolu news agency said 757 Syrians fled their country and streamed into Turkey on Wednesday.

20 Syrians reported seized in Lebanon

Family members of a Lebanese man held by Syrian rebels say they have captured more than 20 Syrians and will hold them until their relative is freed.

The Lebanese prisoner Hassane Salim al-Mikdad appeared in a video released by rebels saying he is a member of Hezbollah, the Lebanese Shia militant group allied with Iran and Syria. He said he was sent to Syria to fight with regime forces.

Abu Ali al-Mikdad, a relative, told reporters in Beirut on Wednesday that they have abducted “more than 20 Syrians” including a senior member of the Free Syrian Army rebel group.

The latest development shows that Syria’s violence could easily spillover to Lebanon, where there are deep divisions between supporters and opponents of Mr. Assad’s regime.

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