I'd like to know all his motives for doing so.

The police said they did not know the motive last night.

The police said they did not know the motive for the attack.

This, of course, is hard to understand, but we cannot know their motives.

They do not know the motive for the murder, the police said.

The police said early this morning that they did not know the motive for the shooting.

Officials said they did not know the motive for the attack, in which no one was injured.

He said the authorities knew the motive but would not release it.

The police said they did not know the motive for the killing or when it had occurred.

Police say they do not know the motive and are looking for the gunman.