investigate circumstances

The state is investigating the circumstances surrounding three recent deaths at the hospital.

Official inquiries were set up in both countries to investigate the circumstances of the disaster.

Mexican authorities are still investigating the circumstances of the murder.

The army said it was investigating the circumstances of the 10-year-old's death.

They might begin investigating the circumstances which allowed their pet to waste himself.

The police said they were investigating the circumstances of the death.

The local police are still investigating the circumstances behind the escape.

The drug agency said it was "investigating all the circumstances associated with these cases."

The office said it was still investigating the circumstances of his first release.

Instead you should suspend the employee on full pay and then investigate the circumstances.