The Russian military is still working to rescue seven sailors trapped on a mini-submarine stranded 190 metres down in Pacific waters. A cable has been attached to the vessel which is being towed to shallower waters. The submersible called “Priz” ran into trouble during a military exercise south of the town of Petropavlosk-Kamchatskiy, in the Kamchatka peninsula. Russia, which says it has 10 ships engaged in the rescue effort, has also asked other countries for help. Chief naval spokesman Igor Dygalo said: “There is no panic on board. We’re in contact minute by minute and we’re receiving constant information. It’s useful for the rescue effort.”The commander of the Pacific fleet says the seven crew have enough air to last until Monday. Meanwhile Japan has sent four military vessels. Britain and the US are also flying out rescue equipment. Though much smaller in scale, the accident recalls the sinking of the Kursk nuclear submarine almost exactly five years ago, when 118 sailors died.