Warships from India, Pakistan, Iran, China, Bangladesh, Russia and Thailand arrived at the Colombo port to attend the 60th anniversary celebrations of the Sri Lankan on Thursday. Sri Lanka formed its own navy on 9th December, 1950, two years after its independence from Britain. Its role in defeating the Tamil Tigers' separatist campaign was crucial. The navy destroyed as many as 10 supply ships of the rebels in the mid seas, cutting off their supply life lines.Meanwhile, Chinese missile destroyer Lanzhou arrived at Colombo port on Wednesday for a five-day visit in the country, reported Xinhua.The destroyer Lanzhou, just ending a five-month escort task in the Gulf of Aden and Somali waters, would attend the celebrations for the anniversary.A special seminar on maritime security titled “Sustainable Support for Security and Safety at Sea” was held today in Colombo with the participation of Sri Lankan navy commanders and representatives from more than 20 countries.