Qatar has blocked Saudi planes from transporting hajj pilgrims, after Riyadh reopened the border despite a major diplomatic crisis roiling the Gulf.<br/>'<br/><br/>Riyadh last week reopened its land border with Qatar and allocated seven flights of the Saudi national carrier to bring pilgrims from Doha, in a temporary lifting of a weeks-long boycott of its Gulf neighbour.<br/>'<br/><br/>The state-run Saudi Press Agency said Qatari authorities have not allowed the aircraft to land as it did not have the right paperwork, although the paperwork was filed days ago. <br/>'<br/><br/>The reopening of the border initially sparked hope of a thawing in the Gulf crisis, which saw Saudi Arabia and its allies cut diplomatic ties with Doha in June over accusations that the emirate supported Islamist extremists.<br/>'<br/>Qatar has denied the allegation.<br/>'<br/>''''''''<br/>