ISLAMABAD Chehlum of Nawasa-e-Rasool Hazrat Imam Hussain (AS) and his 72 companions was observed here on Thursday with due religious fervour and devotion. Small processions started to gather at Markazi Imambargah Asna-e-Ashri G-6/2 from adjacent areas including Noorpur Shahan, Shahzad Town, Tarlai, Shah Allah Ditta and different areas of Rawalpindi. After reaching the Imambargah, a detailed sermon was delivered by the religious scholars in which rich tributes were paid to Hazrat Imam Hussain (AS). 'Zakireen highlighted the significance of the day and shed light on the sacrifices rendered by Imam Hussain (AS) and his companions in upholding the supremacy of Islam. Later, a main procession was taken out from Markazi Imambargah that passed through its traditional routes, Luqman Hakeem Road, Lal Quarters, 7th Avenue, Municipal Road, Melody and finally terminated at the Markazi Imambargah. Hundreds of participants observed 'zanjir zani at Lal Quarters Chowk to commemorate Shuhada-e-Karbalas sacrifice. A large number of people distributed 'niaz (food, milk, soft drinks and simple water) to the participants of the mourning procession. Capital Development Authoritys Health Department had set up free medical camp while Imamia Students Organisation was also active in providing free medical assistance wherever required. Rigorous security measures were taken in and around the Imambargah Markazia, G-6/2, as well as on the set route of the mourning processions. Walkthrough gates in three levels were installed to check individuals entering the Imambargah and participating in the mourning procession. All the roads and streets leading to Markazi Imambargah were closed and even pedestrians were not allowed to sneak into the imambargah through adjacent streets.