Defence Minister A K Antony said that Pakistan continues to push in trained terrorists into India from a large number of terror camps on its soil.<br/> Talking to reporters in Thiruvananthapuram, he said, infiltration is a matter of serious concern and steps are being taken to check this. He also added that it will be difficult to improve ties with Pakistan unless it makes serious and sincere efforts to dismantle the terror camps on its soil.<br/> Mr Antony said, as a policy, India is not for any confrontation with its neighbours and favors improvement of ties.