They are generally solitary animals, and do not share their tunnel complexes with other individuals.

The picture flipped again, showing the bottom level and the tunnel complex.

The tunnel complex is known locally as the Dark Arches.

"The team found an unfinished site, the underground portion of which was an extensive, empty tunnel complex," he said.

During 1947-1959 the tunnel complex held the majority of the country's stock of mustard gas.

Once that was resolved, he could devote his full energies to the tunnel complex below.

"I was checking out a tunnel complex that the platoon had found near a village."

Luong told me there's a tunnel complex under the village.

This tunnel complex will complete major part of the inner ring road.

Our scientists had just broken through to the tunnel complex when the attack occurred.