KARACHI, Dec 27: Educationists, writers and poets have expressed their heartfelt grief over the demise of renowned poet Muneer Niazi. The director the Islami Nizamat Taleem, Central District Karachi, Intikhab Alam Soori, Prime Montessori Training Academy North Nazimabad Director Muhammad Aleem Qureshi, patron-in-chief of Bazm-i-Shamim Adab Arif Mahmood, writer Nooruddin Noor, president of the Halqa-i-Fiqr-o-Nazar Sindh Dr Abdul Hameed, president of the Pakistan Educators Club Mumtaz Adeeb, intellectual Prof Khwaja Qamarul Hassan and patron-in-chief of the Shaheed Tipu Sultan Trust Muhammad Ameen Patel in their separate condolence messages said that the vacuum left by the demise of Muneer Niazi was difficult to be filled.