A brawl between Kazakh workers and their Arab colleagues in one of Kazakhstan’s largest oil fields has left 30 people wounded and led to an outcry in Lebanon and Jordan, a news agency said Sunday, The Washington Post reports.

Videos of the attacks on Arab engineers and workers were widely circulated on social media in Arab countries. The scenes showed them being kicked and punched by large numbers of local workers. Some of those attacked were covered in blood and badly bruised.

Interfax-Kazakhstan said Saturday’s brawl erupted after a Lebanese contractor reportedly posted a photo on WhatsApp featuring a Kazakh female colleague that many in the former Soviet nation saw as insulting.

It reported Sunday that the field is managed by Tengizchevroil, or TCO, a joint venture that includes Chevron and ExxonMobil.

Nurlan Nogayev, the governor of Atyrau region, said during a meeting with company management that the brawl resulted from disparities in working conditions between foreign contractors and local Kazakh employees.

According to Lebanese and Jordanian officials, the wounded engineers and workers include Lebanese, Jordanians and Palestinians.

Lebanese Prime Minister Saad Hariri ordered officials to follow the case. Lebanese Defense Minister Elias Bou Saab also called his counterpart in Kazakhstan to discuss protecting the Lebanese workers.

Maj. Gen. Mohammad Kheir, head of a government agency charged with rescue and relief operations, told the local MTV television that the situation is under control. He said a total of 17 Arabs, including one Lebanese and six Palestinians using Lebanese travel documents, were among those wounded.

Lebanon’s ambassador to Kazakhstan, Jescar Khoury, told local media that all Lebanese citizens who worked at the oil field are now under police protection in a hotel in a nearby city.

In Jordan, Crown Prince Hussein asked the country’s prime minister and foreign minister to follow the case.