( CNN ) -- One of the main opposition videographers in Homs was killed on Tuesday as the Syrian city experienced its heaviest day of bombardment , residents and activists told CNN . `` Rami al-Sayed was crucial in getting the truth out through his videos posted on the Internet , '' said Omar Shaker , a friend and a volunteer at Homs Media Center , a media group set up by activists to share information and videos about the city 's Baba Amr neighborhood . `` We will really miss him , especially the medical team who relied on him to document all the civilian injuries and deaths on video , '' he added . Doctors struggle to save wounded children . Al-Sayed 's own fatal injuries were also apparently recorded on Tuesday as his brother and a physician mourned his death at a mosque 's basement . The video was later uploaded to Al-Sayed 's YouTube channel . See Al-Sayed 's YouTube channel . In the video , Dr. Mohammed al-Mohammed stands by al-Sayed 's dead body and says , `` I want to bring you the latest news , the martyrdom of one of the most important cameramen and one of our most important journalists in Baba Amr . '' `` He kept bleeding here in the field hospital for more than three hours ; we tried to evacuate him outside the neighborhood but to no avail , '' al-Mohammed added . Health workers set up underground network . The 27-year-old was hit by rocket shrapnel as he tried to help a family flee bombardment , residents told CNN . `` Rami was killed because he was documenting and sending real-life stories from Baba Amr . Rami was killed because he was filming the facts ; but we will have 1,000 Ramis . ... Our revolution will prevail , '' the doctor said as the camera zoomed in on shrapnel wounds on al-Sayed 's chest , abdomen and legs . The video-sharing site Bambuser released a statement Tuesday mourning al-Sayed 's death , also referring to him as `` Syrian pioneer , '' his nickname on various social media outlets . `` Rami Ahmad al-Sayed has been one of the bravest and forefront fighters in getting the world 's attention on what 's going on in Homs , Syria . This afternoon , cameraman and journalist Rami Ahmad al-Sayed did his last broadcast -- he and his three friends were soon after this killed by the Assad armed forces , '' the statement said . U.S. calls for international action on Syria . CNN was unable to independently verify the circumstances of al-Sayed 's death . His last message to followers on Twitter was : `` Baba Amr is facing genocide right now . I do not want people to simply say our hearts are with you ! We need actions . We need campaigns everywhere inside Syria and outside Syria . We need all people in front of all embassies all over the world . In a few hours there will be no place called Baba Amr and I expect this to be my last message . No one will forgive you for just talking without any action ! '' Al-Sayed , who had lost a cousin and a fellow videographer in December , is survived by his wife and an 18-month-old daughter . CNN 's Kareem Khadder contributed to this report .
al-Sayed 's , Tuesday , was hit by shrapnel and killed 27 , witnesses say . He `` was crucial in getting the truth out though his videos , '' a friend says . A video posted on YouTube shows a doctor and Rami al-Sayed brother grieving over his body .