Pakistan: Day Two of the Long March

update (8 p.m. GMT): The Zardari Government has met in emergency session. The President has been joined by Prime Minister Gillani, Senate Chairman Farooq Naek, Interior Minister Rehman Malik, Information Minister Sherry Rehman, and Water and Power Minister Raja Pervez Ashraf. Spokesmen are promising "important decisions" within 24 hours.

Update (5 p.m. GMT): High-level talks appear to have begun in Pakistan. The reasons for movement are unclear.

One possibility is that a call from US envoy Richard Holbrooke to President Zardari, following a meeting between the US Ambassador to Pakistan, Anne Patterson, and Nawaz Sharif, has pushed the Government to a more conciliatory position. The US and UK have both denied putting any pressure on Zardari to make concessions to the marchers, though Foreign Secretary David Miliband's office have confirmed that he has spoken to Zardari by telephone.

Update (2.30 p.m. GMT): Former Supreme Court Bar Association President Aitzaz Ahsan has said that the Long March will be called off if Iftikhar Chaudhry is reinstated.

Update (1.45 p.m. GMT): Dawn sources claim that President Zardari may have accepted some of the compromises suggested by PM Gilani.

Update (12 p.m. GMT / 5 p.m. Pakistan): There are rumours that PM Yousaf Raza Gilani is pushing for a compromise, and that President Zardari may be willing to yield to some of the marchers' demands. However police have sealed the Punjab-Sindh border and closed highways to prevent the marchers reaching Multan.

Update (9 a.m. GMT): The Pakistani Government has invoked Section 144, the order authorising detention of demonstrators in the Northwest Frontier Provinces, detaining dozens of people.

There were no reports of further arrests overnight. The most significant incident was the blocking of a convoy from Quetta with Ali Ahmed Kurd, the President of the Supreme Court Bar Association. Kurd and the convoy have responded with a sit-in blocking the main highway from Baluchistan to Sindh Province.