He was executed after a long campaign for clemency failed.

Nagaenthran K Dharmalingam, a 34-year-old Malaysian citizen, was arrested in 2009 for bringing 42.7 grams (1.5 ounces) of heroin into Singapore. He was convicted and sentenced to death in 2010, reports CNN.

Dharmalingam's brother was told by a prison official that the execution had been completed on Wednesday, his family's lawyer, N. Surendran, told CNN.

"His brother is waiting to collect his body and take it back to their hometown, Ipoh in Malaysia," Surendran said.
His case drew international attention as he was assessed by a medical expert to have an IQ of 69 which is a level that indicates an intellectual disability.

In Singapore, the UN rights office, OHCHR, had called on Monday for a stay of execution for two Malaysian nationals accused of drug offences.