SANTIAGO  - A Japanese astronomer with an international project that seeks to explore the origins of stars was killed during a robbery outside his apartment building, police said. A suspect has been arrested and charged with the murder of Koh-Ichiro Morita, 57, who worked on the the Atacama Large Millimeter/Submilmeter Array (ALMA), an observatory in the Chilean Andes, said Victor Arriagada, a police official. Morita was found unconscious Monday by the concierge of the building where he lived in Santiago, and was later taken to a hospital where he died hours later, Arriagada said.

He said an investigation determined that he had been killed with a blow to the head during a robbery.

Christopher Quijada, who had a criminal record, was charged with the crime Friday before a Chilean court, he said.