The condition of former West Bengal Chief Minister Jyoti Basu, who is suffering from acute pneumonia, "marginally improved" today, a close aide of his said quoting doctors.

"Basu's condition has not worsened, but has improved slightly. His falling blood pressure has recorded a small rise while there has been a minor increase in urination," the veteran CPI (M) leader's personal assistant Jaykrishna Ghosh told PTI.