ISLAMABAD - Political and diplomatic efforts by the national and international actors continued on Tuesday to work out an agreed mechanism before tabling the impeachment of President Pervez Musharraf in the Parliament to avert serious political and constitutional crisis in the country. The United States, United Kingdom and Arab friends of Pakistan are busy in the behind the doors parleys to settle the issue amicably between the two warring camps; the President and the ruling alliance. Mark Lyall Grant, former British High Commissioner to Pakistan, is in federal capital these days on an important visit and is meeting warring parties to help defuse the situation and avoid any bitter outcome of the ongoing episode. "These circles are working on the post-resignation scenario of President Musharraf," reliable sources told TheNation. Grant, who is considered as one of the major guarantors in the power-sharing deal between President Musharraf and the slain former prime minister Benazir Bhutto, has met Musharraf Tuesday to persuade him on stepping down instead of pushing the country into confrontation and collision. After his arrival here, he also met with politicians and members of the ruling parties and discussed with them the issue and its impact on the country. However, there is no public confirmation of Grant's meetings with the top leadership of the ruling alliance. There were reports that Grant would meet Co-Chairman PPP Asif Ali Zardari and Mian Nawaz Sharif but there were no independent confirmation of the said meetings. Talking to TheNation the PPP spokesman Farhatullah Babar said there was no schedule of Grant's meeting with Asif Zardari. However, if he met some of his friends in the PPP, he couldn't say anything on this. "As far as meeting with Zardari is concerned, no meeting has held or will be held," he maintained. But contrary to this, people privy to the behind the doors meetings are asserting that the former British High Commissioner had met Zardari and senior PPP leaders on Tuesday before meeting the President. According to media reports, the US Ambassador to Pakistan, Anne W Patterson, has also started consultation with different political party leaders including PML-N top leadership to resolve the crisis. A senior Saudi delegation is also expected in Pakistan later this week for talks with senior leaders.