Commercial ships remain cautious about transiting the strait as tensions escalate between the U.S. and Iran again.

The Strait of Hormuz remained effectively closed despite Iran's declaration Friday that it is open, maritime freight and oil analysts told CNBC.

New attacks on the strait, through which roughly one-fifth of the world’s oil normally passes, threatened to deepen the global energy crisis.

The previous record was 16 crossings on April 14

Commercial ships remain cautious about transiting the strait as tensions escalate between the U.S. and Iran again.

The attacks come shortly after President Donald Trump said the U.S. would extend the ceasefire with Iran to allow peace talks to continue.

One of the cargo ships was 'heavily damaged' by Iranian forces, a British maritime agency reported on Wednesday.

Ship traffic in the Strait of Hormuz is still way below normal levels before the war when more than 100 vessels crossed daily.

Brent oil has risen above $100 per barrel again as tanker traffic through the strait remains at a near standsill.