A Thai worker was lightly wounded by shrapnel Sunday when a Kassam rocket landed in a western Negev moshav. The man was evacuated by Magen David Adom paramedics to Soroka Medical Center in Beersheba, and another person was treated for shock and was also taken to hospital. The Kassam was one of a four-rocket salvo that landed near the Eshkol Regional Council before noon. Islamic Jihad claimed responsibility for the rockets. As casualties from rocket attacks on the Gaza periphery mounted, Israeli officials warned that Shavuot would be a test for the Palestinians and might tilt the balance for or against undertaking a wide-scale military incursion into the Strip in the coming days. Saturday night, IDF troops killed Bilal Shorbasy, a member of Hamas's armed wing, east of Gaza City. The army said that Shorbasy was trying to plant a bomb near the border fence in the northern Gaza Strip. Palestinians reported that another man was also wounded by IDF fire. Also Saturday night, IDF troops arrested a Palestinian fugitive in Jenin. The man was transferred to the custody of security forces for interrogation following his arrest. The West Bank and Gaza Strip was sealed at midnight Saturday for Shavuot. The closure, which barred nearly all Palestinians from entering Israel, was put in place due to unspecific warnings of terror attacks and was scheduled to last through midnight Monday, the army said. In addition, Kibbutz Kfar Aza, near the Gaza Strip, witnessed a mass exodus as families left before Shavuot to take refuge from the incessant rocket and mortar shell attacks. Fifty families spent the holiday in Kibbutz Deganya Alef, near the Kinneret, while dozens of others were planning to stay with relatives elsewhere.