ATHENS – A Medical Examiner in Greece's capital said an autopsy of a 20-year-old mother killed in a brutal home invasion by three men died from asphyxiation after being gagged and having hands put over her nose and lips.

Caroline Crouch, a British-Filipino, was married to helicopter pilot, Charalambos Anagnostopoulos, who was tied up in another room, able to free himself after they left and find her dead in front of their 11-month-old daughter,.

The attackers got off with some 15,000 euros ($18,125) in cash and goods in a crime that shocked the country and saw police mobilize teams of detectives and begin a massive manhunt.

It's unknown whether the invaders were foreigners as reports were mixed about how well they spoke Greek during the attack and Greece has a number of foreign criminal gangs, including from Albania and Georgia.

According to the report, the robbers shoved pieces of cloth in the victim’s mouth before pushing their hands against her nose and lips, which caused her to suffocate, said Kathimerini as the investigation escalated.

Earlier media reports had varied including that she may have been strangled with her blouse to keep her from alerting neighbors as she was said to have been putting up a fight against the attackers.

The New Democracy government put up a 300,000-euro ($362,496) reward for information that leads to capturing the perpetrators but no leads were reported yet nor have authorities said how the early investigation is proceeding.