Indonesian police said on Tuesday they have tested an American teen, detained after the discovery of her mother's battered body in a suitcase in Bali, to see if she is pregnant and are awaiting the result, according to The Associated Press.

No charges have been brought in connection with the murder of Sheila von Wiese-Mack, 62, whose body was found in the bloodied case outside the luxury St. Regis hotel in Nusa Dua, Bali, last week, the AP reported.

Her daughter, Heather Mack, 19, and boyfriend, Tommy Schaefer, 21, were arrested on Wednesday and detained as suspects, according to the AP.

Police last week provided CCTV footage showing the couple speaking to a taxi driver after dropping the bloodied suitcase along with other luggage outside the hotel, according to the AP.

Police said the two left, apparently to check out of the hotel, and never returned, the AP reported. They were later arrested at a nearby budget hotel.

An official at the hospital that conducted the autopsy said von Wiese-Mack had been repeatedly hit on the face and head with a blunt object, according to the AP.

Bali police spokesman Hery Wiyanto said Mack had told them she was pregnant, but police were not able to confirm this, the AP reported.

"We have done some tests but we have not received the result," Wiyanto said, according to the AP. "It could be just something she says so she will be sent home."

Extradition to have the case heard in the United States was highly unlikely, the couple's Indonesian lawyer, Haposan Sihombing, said on Monday, the AP reported.

The couple have refused to speak to Sihombing, the lawyer said, and have hired a U.S. lawyer who Wiyanto said was due to arrive on Wednesday, but only an Indonesian lawyer is permitted to present a case to a domestic court, according to the AP. Murder carries the death penalty in Indonesia.

Suspects are not formally charged with a crime until after an investigation is completed and a trial begins, the AP reported. Police said the investigation, in which the FBI is assisting, could take weeks.