The United States has restricted the hours during which it provides military protection specifically air protection to commercial tankers sailing through the Strait of Hormuz, after a surge in Iranian attacks on ships using the strategic waterway, according to a Financial Times report.

The US has asked tankers travelling through the Strait of Hormuz to sail only at specific times to guarantee military protection after Iran stepped up attacks on ships travelling…

Security 'window' has narrowed this month, sources told FT.