The suspected cause of the incident, which occurred just before midnight Tuesday, is a cracked well casing.

FORBES: Chesapeake Energy Suffers Gas Well Blowout On Anniversary Of BP Spill

Federal guidelines published last year for evaluating organ donors with encephalitis urge "extreme caution" if the suspected cause is a viral pathogen, such as rabies.

NPR: NC Airman At Center Of Rabies Case Was Outdoorsman

The suspected cause of death: head wounds.

CNN: STORY HIGHLIGHTS

At the time, rabies wasn't suspected as the cause of the donor's death, and no rabies test was done before the donor's kidneys, heart and liver were delivered for transplantation in September 2011, the CDC said.

CNN: CDC: Man died of rabies from kidney transplant

Superintendent Chris Singer said intelligence officers had been "working hard" to identify people suspected of wanting to cause problems.

BBC: Banning orders warning ahead of Exeter and Plymouth match

As a result, the investigators on the treatment protocol, the maker of the drug, federal regulators and I would all have suspected that the drug was the proximate cause of death.

FORBES: The Data On Drugs' Side Effects Must Be Reliable

Police officials in Hyderabad, who confirmed that 12 people died, said they have yet to determine the cause of Thursday's explosions and declined to say who they suspected carried out the attacks.

WSJ: At Least 12 Killed in Hyderabad Blasts in India

The suspected virus, the Epstein-Barr virus, is most commonly known as the cause of mono.

FORBES: Multiple Sclerosis May Be Caused By A Virus

That law authorizes state and local law enforcement officials to inquire into the immigration status of any person who is reasonably suspected of being unlawfully present in the United States and to arrest such an individual if there is probable cause to do so.

FORBES: Supreme Court to Consider Preemption of Arizona Immigration Law