Bangladesh Nationalist Party (BNP) acting chairman Tarique Rahman on Saturday visited Dhaka University and offered prayers at the grave of slain student leader Sharif Osman Hadi amid heavy security. The 60-year-old BNP leader also offered prayers at the grave of Bangladesh's national poet Kazi Nazrul Islam, located beside the Dhaka University Central Mosque, The Daily Star newspaper reported. Hadi was buried beside the grave of Nazrul Islam on December 20. Rahman paid respects at the grave of Hadi, a spokesperson of Inqilab Moncho, who was shot dead earlier this month in an attack that has heightened political tensions ahead of national elections scheduled for February. Traffic for both vehicles and pedestrians was halted on both sides of the road from Shahbagh towards Dhaka University during the visit, while members of the Rapid Action Battalion (RAB), Border Guard Bangladesh (BGB) and police were deployed along the route, news portal tbsnews.net reported. BNP Secretary General M