Word of the UN workers' disappearance in Baghlan province followed twin bombings Thursday targeting foreign companies in the southern city of Kandahar that killed at least three people.

A Baghlan police official said the UN employees had been kidnapped by Taleban insurgents. Dan McNorton, a spokesman for the world body in Kabul, said only that the five Afghans, who worked for the UN Office for Project Services, were missing.

“The UN is working with the Afghan authorities to ascertain their current whereabouts and the exact circumstances of the situation,” McNorton said.

Baghlan's deputy police chief, Zalmay Mangal, said Taleban operatives hijacked the workers' vehicles Thursday and the UN employees were being held in Dahana-i-Ghori district of Baghlan province. Afghan police have asked tribal elders in the area to help ensure the workers' safety, he said.

Baghlan, about 120 miles (190 kilometers) north of the capital, was the site of intense fighting Thursday between international forces and Taleban militants. The German soldiers were killed when a rocket slammed into their Eagle armored vehicle, the German Defense Ministry said. Five other German soldiers were wounded.

It was the biggest single-day loss of life suffered by the Germans since June 2003, when four soldiers were killed and 29 wounded in a bombing near Kabul airport.

Baghlan provincial police spokesman Habib Rahman said three Afghan policemen also were killed in Thursday's fighting, which included airstrikes and heavy weapons.

Fighting in the north has proved an increasing distraction from NATO's main forces on Kandahar, the largest city in southern Afghanistan. The city is the spiritual heartland of the Taleban and NATO forces are gearing up for a major operation to drive out insurgents and assert central government control.

The Thursday night attacks on a hotel and compound housing foreign companies in Kandahar showed enduring gaps in security despite a boost in police deployments and stepped-up traffic stops. The Taleban maintains a visible presence in large swaths of the region and parts of the city remain no-go areas for security forces, especially after dark.

On March 13, a suicide squad detonated bombs at a newly fortified prison, police headquarters and two other locations in a failed attempt to free Taleban prisoners. At least 30 people died in the blasts.

The death toll from the latest attacks remained unclear.

Ahmad Wali Karzai, a high-ranking official in Kandahar and the Afghan president's half brother, initially reported three foreigners and three Afghans were killed in the more powerful of the two explosions that occurred after sundown when a suicide bomber detonated his explosives-laden vehicle at the inner security barrier of a compound shared by several Western companies.

However, Kandahar's provincial governor, Tooryalai Wesa, said at a news conference Friday that no foreigners had been killed in the attack. He said 10 foreigners were among 26 people wounded, including three Americans and a South African. The nationalities of the others were not immediately known, Wesa said.

NATO said 10 of the wounded were evacuated to its hospital in Kandahar, but gave no information on their nationalities or medical status.

The blast blew out windows as far as 2.5 miles (4 kilometers) away, including those at Karzai's home. The compound includes the offices of the international contracting company Louis Berger Group, the Afghanistan Stabilization Initiative and the aid contracting company Chemonics International.

Earlier Thursday, a remotely detonated car bomb went off in front of the Noor Jehan Hotel, which includes the offices of several foreign news organizations, wounding eight people and shattering windows in the four-story building.

Karzai said the 2,000 additional police pledged after last month's deadly bombings were sufficient, but he called for better intelligence to obtain inside knowledge of insurgent planning.

The US Embassy on Friday condemned the latest bombings.

“Those killed and injured last night were in Afghanistan tirelessly working to deliver much-needed development, economic opportunity and electricity to the people of Kandahar,” the embassy said in a statement. “The terrorists who carried out this attack are clearly not interested in improving the lives of Kandaharis.” - Noor Khan reported from Kandahar.