Washington, Sep 11 - As the US prepared to observe the eighth anniversary of the terror attacks on the World Trade Center and elsewhere, Indian Home Minister P. Chidambaram said he was 'quite impressed' by what the US has done to counter terror and some of its practices can be applied to Indian cities.

'I was quite impressed with what they have done (after 9/11). Some of the practices can be applied to India's mega-cities like Delhi, Mumbai, etc.,' Chidambaram told Indian journalists as he rounded up his visit to New York and Washington, that included a meeting Thurday with US Secretary of State Hillary Clinton.

Chidambaram said he has learnt valuable security tips from the New York Police Department (NYPD) and will implement them in securing India's mega-cities against terrorist attacks.

Expressing satisfaction with his talks with American leaders on counter-terrorism and intelligence-sharing, Chidambaram said the US shares India's concern about its security.

He said: 'I am pleased with the level of interest shown by the officials and leaders of the US administration.