German officials seek 2 over suspect device

German officials say a device found on a railway station platform in Bonn could have caused a dangerous explosion if detonated, and they're looking for two people who may be involved in the case.

The device was found in a bag Monday and defused. Investigators said Wednesday it was composed of four butane gas cartridges, a metal pipe containing ammonium nitrate powder, three batteries and an alarm clock - but they haven't found any detonator.

Investigator Norbert Wagner said authorities are seeking a man seen carrying a bag in security footage from a station restaurant, as well as another man whom children reported seeing leaving the bag containing the device on the platform.

Police detained two men Tuesday, including a local Islamist radical, but released them for lack of evidence.

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Photo provided by the Cologne Police Tuesday Dec. 11, 2012 shows a bag that was discovered in the Bonn, western Germany, main station Monday, Dec. 10, 2012. German police are appealing for the public's help in finding a man believed to have been behind a bomb scare at the main train station in Bonn. Cologne police, which are leading the investigation, on Tuesday released a sketch of a man who a 14-year-old said he saw placing a bag containing the suspicious device by the tracks on Monday. The man is described as being between 30-35 years old, and about 190 cm (6-foot 3-inches) tall. He has dark skin and was wearing a black hat, black boots and a gray-brown jacket. The station was closed for several hours as a bomb disposal team opened the bag and found what police called a "non-functioning mock up" of a pipe bomb. Police wouldn't comment further on the case. (AP Photo/Cologne Police)