The police said the cause of the shooting remained under investigation.

Four of the eight boys set free from jail remain under investigation, although it could not be learned which ones.

Executives of both companies, along with others, remain under investigation.

Fire officials said last night that the cause remained under investigation.

The public health agency also said a further 30 suspected cases remain under investigation.

The cause of the fire remained under investigation last night.

In each case, the cause of the blaze remains under investigation.

Of those, four remained under investigation, the authorities said today.

The cause of the fire has not been determined and remains under investigation.

The cause of the blast, he said, remains under investigation.