Cavaignac, for motives still unknown, kept the matter secret for a fortnight.

"Then you have some other motive unknown to us?"

He was an uptimer with unknown motives, unknown ways of thinking.

This gives Rackham a motive, previously unknown to the police, for the murder.

They had been set on this course by a machine intelligence of unknown motives, the Mantis.

Pitts watched me for a few minutes, then picked up a bucket and ambled into the ladies room, his motives unknown.

Yet suddenly, murders for "unknown motive" jumped 100 percent over 1985 and 1,000 percent over 1984.

On July 6, 2002, Qadir and his son-in-law were killed by gunmen in a surprise attack with unknown motive.

Kirk agrees, but things turn out to be more exciting than they expected when the Museum is attacked by terrorists with unknown motives.

Meanwhile, a mysterious faction with unknown motives takes advantage of the destruction and pushes both sides deeper into conflict from behind the scenes.