At least seven Iranian police officers have died in a clash with drug smugglers in the east of the country.
State radio reports the incident happened in Khorasan province near the Afghan border.
Four drugs traffickers were killed and another seriously wounded. Two tonnes of drugs were confiscated.
The BBC reports the region is on a major narcotics route from Afghanistan and Pakistan.
Another report, by the official Irna news agency, said four more policemen wounded in the clash, later died of their injuries.