Stream of mourners lined up today before the CPI-M headquarters in Kolkata to pay their last respect to the former Chief Minister of West Bengal Jyoti Basu who died in Kolkata on Sunday. Mourners with bouquets and garlands also gathered in front of the Indira Bhavan at Salt Lake, the official residence of the departed leader. West Bengal is observing a two-day state mourning beginning today. A holiday has been declared in the state government offices as a mark of respect to the veteran communist leader. Basu's body has been kept at the private funeral parlour from where it would be taken tomorrow in a procession first to the state secretariat, then the Assembly building and finally to the state-run SSKM Hospital for handover to the hospital authorities for medical research. CPI-M flags were flown in half mast in different party offices across the state.Vice President Hamid Ansari and Prime Minister Manmohan Singh today visited the CPI(M) headquarters in New Delhi to pay homage to Marxist veteran leader Jyoti Basu. Dr Singh reached the AKG Bhawan at Gole Market, the CPM Headquarters, at 11.10 am and paid floral tributes to Basu, who died in Kolkata yesterday after fighting a battle with pneumonia. The Prime Minister also signed the condolence book. Earlier, Mr Ansari paid floral tributes to Basu and also signed the condolence book.The Bangladesh Parliament, Jatiya Sangsad paid rich tributes to Jyoti Basu, the former chief minister of West Bengal who passed away on Sunday. The house unanimously adopted an obituary reference moved by the Speaker which described Jyoti Basu as a symbol of honesty, tolerance and ideology and one who will remain as a source of endless inspiration for posterity. Leader of the House and Prime Minister Sheikh Hasina said while India has lost a leader, Bangladesh has lost a well- wisher and she has lost a guardian. The Prime Minister recalled Jyoti Basu's contribution in the War of Liberation in 1971 and said he and his party extended all-out support to the helpless refugees of Bangladesh. Ms Hasina said the home of Jyoti Basu in Sanargoan, Narayanganj, would be preserved as a library as per the desire of the great leader. Members of Parliament from all the parties paid rich tributes to Jyoti Basu.Veteran Marxist leader and former Chief Minister of West Bengal Jyoti Basu died in Kolkata yesterday. 96-year-old Basu breathed his last at 11.47 am at the AMRI Hospital where he was admitted with pneumonia on the 1st of January. He had been ailing for the last two years. But his health deteriorated in the last few days when he developed a multi-organ failure. He was put on pace-maker and haemo-dialysis but he could never recover.Mr. Basu strode the political arena for over six decades and was a leading figure in uniting opposition parties against the Congress in the 80s and 90s. He had stepped down as West Bengal Chief Minister in November 2000 after 23-year tenure. He holds the record of being the longest-serving Chief Minister in the country.Thousands of mourners thronged the roads as Basu's body was taken to Peace Haven, a private funeral parlour, where it has been kept for people to pay homage till today. His last journey will begin from there on Tuesday. After visiting several places, it will be handed over to the S. S. K. M. hospital authority in Kolkata for medical research. His eyes, which he had donated, were removed by doctors of an eye hospital.