A、On Saturday. B、On Monday. C、On Tuesday. Ckidnapped绑架。

Security forces and ethnic Albanian gunmen have fought near the northwestern Macedonian town of Tetovo. The conflict happened as Yugoslav forces entered the security area in southern Serbia near the border with Kosovo. They entered under terms of an agreement with NATO. Heavy gunfire and explosions were heard in the hills around Tetovo. At the same time several thousand ethnic Albanians demonstrated in the town center. They were protesting what they called government repression of their community. At least 9 policemen were reported injured.
Q: How many policemen were reported injured in the demonstration?

Nairobi. Five United Nations aid workers released by Somali gunmen have arrived in Kenya. The former hostages say they are in good health. The aid workers were kidnapped Tuesday during an attack against the headquarters of the group "Doctors without Borders" in Mogadishu. At least 14 people died in the attack. The gunmen are followers of a local leader Musa Su Yallhal. He opposes the temporary Somali government. The gunmen are still believed to be holding four more United Nations workers. The UN says it is holding talks with the Yallhal group.
Q: When were the UN aid workers kidnapped?