The Election Commission of Pakistan (ECP) has announced it will not be able to test biometric thumb verification machines in upcoming by-election polls.The ECP has said that the delay has been caused by the National Database and Registration Authority (NADRA) refusing to share voter data with the top election body.The ECP had announced to test biometric machines for voters' verification at PS-114 Karachi by-polls as a pilot project and to submit report in this regard to the parliamentary committee on electoral reforms.The committee had to include a provision in law on use of this technology for general elections.The ECP had purchased 100 biometric machines for a test run. However, the plan suffered a blow when NADRA declined to share data of thumbs and pictures of voters with the ECP.