MOGADISHU (Reuters) - Pirates seized a Greek-owned bulk carrier in the North Arabian sea on Monday, taking the 23-strong crew hostage, the European Union's anti-piracy taskforce said. EU Navfor said the MV Dover was hijacked about 260 nautical miles north east of Salalah in Oman. Communication with the vessel had been lost, it said. Meanwhile, a Turkish frigate repulsed an attack by pirates on a Turkish-flagged freighter east of Oman, the Turkish General Staff said in a statement on Monday. The M/V Kiran Asya, travelling from the United States to Iraq, came under attack 85 miles (137 km) east of Oman on Sunday morning. The Turkish frigate TCG Giresun, which was in the area, responded by mobilising a helicopter to protect the ship. Meanwhile, a Danish sailboat with a family of five and two crew members aboard has been seized by pirates in the Indian Ocean, Danish officials said on Monday. The Danish naval command received a distress signal from the vessel on Feb. 24, the foreign ministry said. "It can now be confirmed that the sailboat has been hijacked by pirates in the Indian Ocean," the ministry said in a statement. A Danish family consisting of the parents and their three children 12-16 years of age and two Danish crew members were aboard when the vessel was seized, it said. No further details were immediately available. Piracy is rife off the Horn of Africa though pirates have usually targeted cargo vessels and not private craft.