"These are killings-for-hire cases involving a sophisticated international set-up spread over multiple jurisdictions," Pakistan's Foreign Secretary Muhammad Syrus Qazi told reporters.

India's foreign ministry did not immediately respond to a request for comment.

Qazi said the method of assassination was similar to attempts in Canada and the United States.

Pakistan's allegations come months after both Canada and the United States separately accused Indian agents of being linked to assassination attempts on their soil.

India has rejected Ottawa's allegations and has launched an investigation into U.S. allegations.

(Reporting by Asif Shahzad and Krishn Kaushik in New Delhi, writing by Shilpa Jamkhandikar, Editing by Alex Richardson and Gareth Jones)