The country's incumbent government led by the PM Nawaz Sharif's PML-N has been hounded by the cricketer-turned-politician Imran Khan's Pakistan Tehreek-e-Insaf (PTI) over the charges of poll rigging during 2013 elections and neck-deep corruption.
Khan has claimed that the country would not get justice as long as Sharif, who according to him had a "fake mandate", remains the Pak Premiere and has demanded that fresh polls should be conducted.
Reasons of protests in Pakistan
The protests began when thousands of supporters of Pakistan Awami Tehreek (PAT) chief Tahirul Qadri and Imran Khan started two separate long marches from Lahore on August 14 and reached Islamabad on August 15. Both parties have held talks with the government for their demands but the talks remained deadlocked.
"The rigged election has to be challenged to safeguard democracy and the credibility of voting," Khan had said.
Imran Khan, whose PTI has 34 seats in the National Assembly or lower house of parliament, alleges that Sharif rigged the 2013 general elections. He has been demanding a probe by the apex court and re-elections.
Qadri's supporters have been pressing for their 10-point agenda, including the prime minister's resignation and the registration of a murder case against 21 people, including Nawaz Sharif and his brother, over the June 17 police firing in Lahore's Model Town area against PAT demonstrators.
In his movement against the Pak government, Imran Khan has been joined by the cleric Qadri and his massive followers to ouster Nawaz Sharif from the Parliament.
Both Khan and Qadri have been giving vitriolic speeches and instigating the masses to not give up and lay siege on the Pak Parliament.
Is Imran Khan backed by Pak army and ISI?
The present state of anarchism and complete mayhem in Pakistan may be the brainchild of Imran Khan or he may have been supported by the Pak army and the powerful notorious agency Inter-Services Intelligence (ISI).
Both Khan and Qadri accepted the role of the army chief Raheel Sharif as a mediator and guarantor in solving the current political impasse.
After their meeting with the Army chief, blame game began on Aug 28. While PM Nawaz Sharif claimed that Khan and Qadri had wanted army chief as a mediator, Qadri denied such statements.
The military later issued a statement saying that it was playing the role of 'facilitator' in the ongoing political crisis at the behest of the government.
Will Nawaz Sharif be subservient to dominating Pak army?
The bitter fact that Pak army and ISI can never accept good relations with India can also prove disastrous if Imran Khan manages to take over the Nawaz Sharif government, with a might-be-possible fourth military coup, in the ongoing chaotic situation.
In case of military coup, Sharif would have to consult Pak army for all his decisions from India to fighting terrorism.
What has happened in Pakistan till now?
The last week attack left at least eight supporters of Imran Khan killed and about 450 injured.
Following the casualties, Khan vowed not to spare Sharif, his brother and Punjab Chief Minister Shahbaz Sharif, and Interior Minister Chaudhry Nisar Ali Khan after Sunday's incident.
On Monday, the police registered an FIR against Khan and Qadri on behalf of the government, under terrorism laws, for breaching the agreement with Islamabad administration.