A Syrian woman, cries as she carries her injured son who was shot in his hand by the Syrian border guard when they were crossing a river from Syria to Lebanon, at the northern Lebanese-Syrian border town of Wadi Khaled, in Akkar, north Lebanon, Wednesday, May 30. U.N. observers have discovered 13 bound corpses in eastern Syria, many of them apparently shot execution-style, the monitoring mission said Wednesday. The announcement comes days after a massacre in Houla, in the central Homs province, which killed more than 100 people and prompted worldwide condemnation against the regime of President Bashar Assad.

A Lebanese Red Cross volunteer, left, treats a Syrian injured man who was shot in his leg by the Syrian border guard when he was crossing a river from Syria into Lebanon, is seen on the ground, at the northern Lebanese-Syrian border town of Wadi Khaled, in Akkar, north Lebanon, Wednesday May 30.

A young Malian refugee shelters in M'bere camp near Bassiknouin south-east Mauritania on May 2.

A youmg girl poses in the M'bere refugee camp near Bassiknou in the Nema region of Southwestern Mauritania on May 2. More than 320,000 people have fled their homes in Mali since mid-January, with more than half seeking refuge in neighbouring countries, UN officials said.

Malian army soldiers patrol in the M'bere refugee camp near Bassiknou in the Nema region of Southwestern Mauritania on May 2.