内容摘要：Police have launched an investigation into the deaths of patients following heart operations at an NHS hospital, the BBC has learned.

Police have launched an investigation into the deaths of patients following heart operations at an NHS hospital, the BBC has learned.

The SBU said its director, Lieutenant General Vasyl Malyuk, personally supervised the operation and coordinated its planning.In a Telegram post, it quoted Malyuk as saying Ukraine had hit the Crimea bridge in

and was therefore "continuing this tradition under water.""No illegal Russian facilities have a place on the territory of our state," Malyuk said."Therefore, the Crimean Bridge is an absolutely legitimate target, especially considering that the enemy used it as a logistical artery to supply its troops."

The bridge - also known as Kerch Bridge - was built by Russia after it invaded and annexed the Crimean Peninsula in 2014. It was inaugurated by Russian President Vladimir Putin to great fanfare in 2018.In Ukraine, the bridge is a hated symbol of Russian occupation. Moscow guards it carefully - which makes any attack on it, whether with underwater drones or explosives, a remarkable achievement.

Tuesday's strike on the bridge comes barely 48 hours after

Kyiv said it smuggled more than 100 drones into Russia and managed to get them delivered near air bases by unsuspecting lorry drivers.Responding to the move, China called on the US to protect international students.

"We urge the US side to earnestly safeguard the legitimate rights and interests of international students, including those from China," an official was quoted as saying. Hundreds of thousands of Chinese students attend US universities.The universities themselves are likely to be disquieted as well. Many of them rely on foreign students for a significant chunk of their funding - as those scholars often pay higher tuition fees.

Foreign students who want to study in the US are usually required to schedule interviews at a US embassy in their home country before approval.State department spokesperson Tammy Bruce told reporters on Tuesday: "We take very seriously the process of vetting who it is that comes into the country, and we're going to continue to do that."