With an economy tanked under the weight of U.S. sanctions and the worst COVID-19 pandemic impact in the Middle East, Iran has faced nearly continuous protests by workers and pensioners for months over an inflation rate of more than 50%, high unemployment and unpaid wages.
An unspecified number of workers with temporary hiring contracts "stayed home" to press for higher wages earlier this week in Assaluyeh, Iran's main gas production hub on the Gulf, the semi-official Iranian Labor News Agency (ILNA) reported.
Some officials and parliamentarians acknowledged the protests and called for efforts to help resolve the issues that prompted them.
"Since we learned of the labor actions and their salary and benefit demands... the issues are being seriously followed up in (parliament's) Energy Commission," Mousa Ahmadi, a lawmaker whose district includes Assaluyeh, told ILNA.
According to rights groups and social media posts, Tehran's refinery has fired 700 striking workers. A social media video showed refinery workers holding up what appeared to be notices of termination.
Shaker Khafai, spokesman for the state-run Tehran Oil Refining Company, denied the dismissal report and said a sub-contractor had laid off 35 workers, the state news agency IRNA reported.
The protests, dubbed "Campaign 1400" with reference to the Iranian calendar year, saw two gatherings on Thursday, including one by workers at a power plant in Iran's Gulf island of Qeshm, the Human Rights Activists News Agency (HRANA), which is based outside the country, reported on Friday.
There was no immediate report of widespread action against protesters by security forces which have cracked down on protests in the past, especially when they have turned political.
Iran held a presidential election last week, won by hardline judiciary chief Ebrahim Raisi, who will take office in August, replacing pragmatist Hassan Rouhani.