JERUSALEM — An Israeli military court on Tuesday sentenced a Palestinian man to three life terms for his role as logistics commander in the abduction and murder of three Israeli teenagers in the occupied West Bank in June, a crucial chapter in last year’s deterioration of Israeli-Palestinian relations.

The man, Hussam Qawasmeh, 41, part of a sprawling clan in the West Bank city of Hebron with ties to the militant Islamist Hamas movement, was convicted last week of handling $60,000 in five installments from the Gaza Strip to buy two cars, two M-16 rifles and two pistols for use in the operation. In September, Israeli troops cornered and killed the two men they believe carried out the kidnapping and murders: Marwan Qawasmeh, 29, a relative of Mr. Qawasmeh’s, and Amer Abu Aisha, 33.

“The defendant is charged with the most severe crimes in the book of laws,” said a seven-page court document summarizing the sentencing by a three-judge panel. “The lives of the teens ended at once, and the lives of the families have changed forever.”

The document said the prison time was the maximum allowable, and it also ordered Mr. Qawasmeh to pay the victims’ families the equivalent of about $63,000 each. It added, “The murder disrupted the feelings of the region and led to a security escalation in a chain of harsh events.”