Islamabad, Feb. 18 -- Jailed former prime minister Imran Khan's party has decided to sit in the Opposition in Parliament while launching a countrywide protest against alleged rigging in the elections after its efforts to form the next government failed.

The major political parties in Pakistan have stepped up efforts to form a federal government after the February 8 elections delivered a split verdict.

While Khan's Pakistan Tehreek-e-Insaf (PTI) party-backed independent candidates dominated the election results, Pakistan Muslim League-Nawaz (PML-N) claimed to have enough numbers to form the government as some independents joined the Nawaz Sharif-led party post-polls.

PTI leader Barrister Muhammad Ali Saif announced on Friday that follow...