I think it will be worth looking into the cause.

The government did not go into the possible cause of the crash.

Then we have got to look into the causes, why people are going around doing this.

I think that we need to do more research into the causes.

Have the general tell him the investigation into the cause is continuing.

An investigation into the cause of his death is ongoing.

The agencies are looking into the cause of the accident.

He added that an investigation into the cause of the accident was under way.

They don't go into the cause of goodness, so why the other shop?

School investigators are still looking into the cause of the accident.