Suspected American terrorist David Headley had stayed in two hotels here before the 26/11 attacks in Mumbai and investigators are poring into details whether he had any role in various blasts that had taken place in the country between 2006 and 2008.
The operatives of National Investigation Agency (NIA), which had registered a case Wednesday against Headley, are looking into the possibility of whether the US national of Pakistani origin also had any plans for carrying out multiple blasts in multiple cities.
Headley was arrested by Federal Bureau of Investigation (FBI) a few months ago for supected links with Lashkar-e-Toiba (LeT) along with his Canadian associate Tahawwur Hussain Rana.
The NIA officials today visited the two hotels where Headley had stayed in Delhi and also recovered his passport details.
Official sources said that Headley had stayed for a total of over 12 months during his multiple visits to India. Details have emerged of telephone calls made to several foreign countries, including Pakistan.
Sources said investigators were planning to go to Abu Dhabi to find out Headley's possible links there because of his arrival from that country on an occasion and calls made by him to people there.