Former Lok Sabha speakerSomnath Chatterjee has been admitted to a private hospital here after suffering a mild cerebral stroke."Chatterjee was admitted at around 8.30 pm Sunday evening.He suffered a mild cerebral stroke. He has undergone treatment and is presently stable. He is now in the ICU," senior hospital official P Tandon said.Presently his condition is stable, he added.This is second time in the last six months that 84-year-old Chatterjee was hospitalised.