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. Last Updated: 07/27/2016

Radioactive Wire Found in Jet Crash

VILNIUS, Lithuania -- Lithuanian officials suspended their work Wednesday on the wreckage of a crashed Russian fighter jet after a slightly radioactive wire was found at the crash site, the lead investigator said.

General Vitalijus Vaiksmoras said work would not resume until Russian authorities had provided more information about any hazardous materials that may have been on the plane.

The Su-27 fighter bomber crashed last Thursday in Lithuania while traveling from St. Petersburg to the exclave of Kaliningrad. The pilot is accused of violating Lithuanian airspace.

Health Ministry spokesman Albinas Mastauskas said investigators found a wire in the wreckage that emits levels of radiation slightly above normal.

"It is not significant radiation and does not pose any threat," Mastauskas said, adding that such material was not unusual in fighter planes.

Still, Lithuania demanded that Russia provide more information about any other potentially hazardous substances on the plane before they continue the investigation.

The crash has worsened tense relations between the two countries, with Lithuania rejecting demands to release the pilot, Major Valery Troyanov.

Earlier Wednesday, Vaiksmoras said Lithuania had asked its NATO allies for help reading the jet's flight data recorders, or black boxes, because the Baltic country lacked the technology needed to read them properly.

Investigators also urged area residents to return scattered parts of the plane that they had taken home as souvenirs.