Iranian judicial officials are undertaking a campaign against drug-trafficking in the country which has led to dozens of hangings. An Iranian-Dutch woman was hanged on Saturday, but she is just one of many. From Sify comes the death toll for this month:

On Jan 19, Iran hanged 10 men in the city of Karaj, 45 km west of Tehran, for supplying and distributing different kinds of drugs.
On Jan 13, Iran hanged five drug traffickers in the western city of Khorramabad, the capital city of Lorestan province, for supplying and distributing drugs, after it had hanged seven drug traffickers in Tehran a day earlier for keeping and distributing heroin, hashish and opium.
On Jan 3, Iran hanged seven unidentified drug traffickers in the central prison of the western Kermanshah city who were convicted of producing and distributing heroin and crack.
Two days earlier, Iran also reported the execution of eight drug smugglers in the central city of Qom.

Research for IHRA’s Death Penalty Project against the use of the death penalty in drugs cases led to the UNODC explicitly stating its opposition to capital punishment for drug crimes. However hundreds, possibly over a thousand, were executed globally for drug offences in 2010.