MOSCOW (Reuters) - A Russian submarine fired cruise missiles at jihadi targets in Syria s Idlib province on Friday, the Russian Defence Ministry said, saying it had targeted Islamist militants who had tried to trap a group of Russian military policemen earlier in the week. The strike, launched from the Mediterranean by Russia s  Veliky Novgorod  submarine, was part of a counter-offensive against a jihadi attack on government-held parts of northwest Syria near Hama on Tuesday. The Russian Defence Ministry on Wednesday said 29 Russian military policemen had been surrounded by jihadis as a result of that attack and that Russia had been forced to break them out in a special operation backed by air power. On Friday, it said in a statement it had fired Kalibr cruise missiles at the same jihadis from a distance of 300 kilometers (186.41 miles) striking command centers, armored vehicles and the bases of jihadis who had taken part in the original attack. 