Baghdad, Feb 10 : Iraqi authorities have pledged to recover all the ancient artefacts that were stolen after the US-led invasion in 2003, a local media report said citing a top official. "The board is determined to recover the first and last Iraqi artefact smuggled abroad, and we will not give up a single piece of it, regardless of its size and importance," Xinhua news agency quoted Laith Hussein, head of the State Board of Antiquities and Heritage of the Ministry of Culture, Tourism and Antiquities, as saying to the Iraqi al-Sabah on Tuesday. There is international cooperation in recovering the antiquities that were looted and stolen from the archaeological sites as well as the Iraq Museum in the capital Baghdad, he said. Hundreds of lawsuits have been filed by the Ministry outside Iraq on the stolen artefacts, Hussein added. According to the official, the Iraqi authorities have great difficulty in protecting archaeological sites in Iraq as the country is "like a museum", where "thousands of archaeological sites spread widely across its land from north to south". "Nevertheless, the board continues to intensify monitoring of archaeological sites by fencing them with wires and increasing the number of guards to prevent their damage," Hussein noted. According to official statistics, about 15,000 pieces of cultural relics from the Stone Age ranging from the Babylonian, Assyrian, and Islamic periods were stolen or destroyed, mainly in the Iraq Museum, after Saddam Hussein's regime was toppled by US-led troops in 2003. Then after the Islamic State (IS) terror group took control of large territories in northern and western Iraq in 2014, the museum of Mosul as well as the ancient cities of Hatra and Nimrud were destroyed, with large numbers of antiquities smuggled. Statistics show that more than 10,000 sites in Iraq are officially recognised as archaeological sites, but most of them are not safeguarded and many were still being looted. /IANS