DAMASCUS, Syria -- DAMASCUS, Syria (AP) — Eyewitnesses say a mortar shell has slammed into a Damascus building that houses the Vatican's embassy.

It was not clear if the diplomatic mission was specifically targeted in the early morning attack Tuesday, which damaged the roof.

The building is located on the edge of the upscale Damascus' district of Abu Roummaneh. No casualties were reported.

There was no claim of responsibility for the attack, the latest in the string of assaults on foreign diplomatic missions in Damascus.

Rebels fighting to topple President Bashar Assad have frequently fired mortars into Damascus to disrupt life in the capital, where the government tries to portray the situation as normal despite the civil war raging well into its third year.

Earlier on HuffPost:

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  • Men wait to be searched by the Syrian military after they have crossed from the rebel held suburb of Moadamiyeh to the government held territory Tuesday Oct. 29, 2013 in Damascus, Syria. (AP Photo/Dusan Vranic)

  • A man is helped by Red Crescent workers on his way from the rebel held suburb of Moadamiyeh to the government held territory Tuesday Oct. 29, 2013 in Damascus, Syria. (AP Photo/Dusan Vranic)

  • Elderly men carry their belongings as they arrived from the rebel held suburb of Moadamiyeh to the government held territory Tuesday Oct. 29, 2013 in Damascus, Syria. (AP Photo/Dusan Vranic)

  • A man is searched by a Syrian soldier as he arrived from the rebel held suburb of Moadamiyeh to the government held territory Tuesday Oct. 29, 2013 in Damascus, Syria. (AP Photo/Dusan Vranic)

  • A man walks past Syrian soldiers as he arrived from the rebel held suburb of Moadamiyeh to the government held territory Tuesday Oct. 29, 2013 in Damascus, Syria. (AP Photo/Dusan Vranic)

  • Women and children walk from the rebel held suburb of Moadamiyeh to the government held territory Tuesday Oct. 29, 2013 in Damascus, Syria. (AP Photo/Dusan Vranic)

  • A man is helped by a Red Crescent worker on his way from the rebel held suburb of Moadamiyeh to the government held territory Tuesday Oct. 29, 2013 in Damascus, Syria. Nearly 2,000 residents of the besieged western Damascus suburb of Moadamiyeh have fled their homes and have surrendered to the Syrian authorities after reports of starvation and disease triggered an international outcry for their help. (AP Photo/Dusan Vranic)

  • Men wait to be searched by the Syrian military after they have crossed from the rebel held suburb of Moadamiyeh to the government held territory Tuesday Oct. 29, 2013 in Damascus, Syria. (AP Photo/Dusan Vranic)

  • Women walk from the rebel held suburb of Moadamiyeh to the government held territory Tuesday Oct. 29, 2013 in Damascus, Syria. (AP Photo/Dusan Vranic)

  • Men walk from the rebel held suburb of Moadamiyeh to the government held territory Tuesday Oct. 29, 2013 in Damascus, Syria. (AP Photo/Dusan Vranic)

  • Men wait to be searched by the Syrian military after they have crossed from the rebel held suburb of Moadamiyeh to the government held territory Tuesday Oct. 29, 2013 in Damascus, Syria. (AP Photo/Dusan Vranic)

  • Men wait to be searched by the Syrian military after they have crossed from the rebel held suburb of Moadamiyeh to the government held territory Tuesday Oct. 29, 2013 in Damascus, Syria. (AP Photo/Dusan Vranic)