QUETTA: Pakistan has heightened security along districts bordering Iran as violent protests continue to engulf several Iranian cities, a top official in Pakistan’s southwestern Balochistan province said on Thursday, with authorities stepping up vigilance to guard against potential spillover.

The development comes as Iranian authorities try to suppress protests, which began late last month over the country’s faltering economy and the collapse of its currency, with more than 2,600 killed in weeks of violence in the Islamic republic.

The clampdown on demonstrations, the worst since the country’s 1979 Islamic revolution, has drawn threats from the United States (US) of a military intervention on behalf of the protesters, raising fears of further tensions in an already volatile region.

Pakistan, which shares a 909-kilometer-long border with Iran in its southwest, has said that it is closely monitoring the situation in the neighboring country and advised its citizens to keep essential travel documents with them amid the unrest.

“The federal government is monitoring the situation regarding what is happening in Iran and the provincial government is in touch with the federal government,” Hamza Shafqaat, an additional chief secretary at the Balochistan Home Department, told Arab News in an exclusive interview on Thursday.