Myanmar's ruling party has called a hastily arranged leadership meeting on Monday to prepare for a showdown with their ousted party chairman in parliament this week, two senior party members said on Sunday.

Rivalry between two of Myanmar's most powerful establishment figures — party chairman Shwe Mann and President Thein Sein — came to a head in a late-night drama on Wednesday, when trucks with security personnel sealed off the headquarters of the Union Solidarity and Development Party (USDP).

The president sacked Shwe Mann and purged his allies from the USDP leadership, just three months before the country's first free election in 25 years.