QUETTA, Pakistan (AP) — Thousands of supporters of Pakistan's imprisoned former Prime Minister Imran Khan and members of other political parties blocked key highways and started a daylong strike in the volatile southwest Monday to protest alleged rigging of last week's elections. Thursday's vote to choose a new parliament was overshadowed by the vote-rigging allegations, an unprecedented mobile phone shutdown, and the exclusion of Khan and his Pakistan Tehreek-e-Insaf party, or PTI, from the vote. While election winners were celebrating victory, PTI and other parties refused to accept their defeat in dozens of constituencies.