Serge Atlaoui, center, a French citizen who is on death row after being convicted of drug offenses, at the district court in Tangerang, Indonesia, in March. Credit Tatan Syuflana/Associated Press

Jakarta, Indonesia — An Indonesian court rejected on Monday an appeal of a French drug convict, potentially reigniting international tensions over the country’s use of the death penalty for serious narcotics offenses.

The convict, Serge Atlaoui, 51, lost his appeal to the State Administrative Court in Jakarta, which aimed to upend President Joko Widodo’s decision last December to deny him clemency following a death sentence.