Nairobi , Kenya ( CNN ) Kenya froze dozens of accounts linked to suspected terror supporters after militants massacred 147 people last week at a university in Garissa . The government is tracking the finances of people suspected of ties to Al-Shabaab , the militant group that claimed responsibility for the Thursday attack . So far , the government has frozen 86 accounts , but that number could go up , said Mwenda Njoka , a spokesman for the Interior Ministry . The government has tracked supporters of the terror group since 2011 , and efforts to freeze their assets have gone on since then . It has a list of suspects from various parts of the country , but mostly in Nairobi and Mombasa , he said . Kenyans mourned the victims of the attack Tuesday night at Nairobi 's Uhuru Park , where hundreds gathered . Organizers unloaded 147 crosses , some draped with the nation 's flag , as candles flickered in the dark . Of the fatalities , 142 were students at the university , and the rest were security forces and campus security . `` I ca n't even look at pictures of the people killed without crying , '' said Mary Wambui , 32 , who lives in Nakuru , hundreds of miles from Garissa . `` They were just children . They were trying to make a better life for themselves . Some were first to go to college in their communities . They died trying to get an education . '' Using the hashtag # 147notjustanumber , Kenyans used social media to talk about the lives of the victims . They shared pictures of beaming faces , full of life and energy , in happier days . They talked about parents too shocked to speak after identifying their children 's bodies . Some students remain unaccounted for , and wailing relatives alternate their searches between hospitals and morgues . Kenyan authorities have not released the names of the victims . Kenyan authorities had prior intelligence that a university in Garissa could be attacked , yet the country 's rapid response team was stuck in Nairobi for hours after the massacre awaiting transport , a police source said Monday . The frozen accounts is the latest in a series of actions as the government faced heavy criticism for the siege , which lasted hours . A spokesman for President Uhuru Kenyatta said authorities `` got the job done '' and saved lives . The university had about 800 students . `` With the benefit of hindsight , you can always say things could have been done better , '' Manoah Esipisu said . Kenya also launched airstrikes Monday targeting Al-Shabaab 's training camps in Somalia , according to a military source , who said they were not retaliation for last week 's massacre . `` The latest attack of Al-Shabaab bases by the Kenya military is part of the ongoing operations that started in 2011 , '' the source said Monday . Kenya has also offered 20 million Kenyan shillings , or about $ 215,000 , for information on the whereabouts of Mohamed Mohamud , who allegedly organized the attack . Mohamud is a senior Al-Shabaab leader known by the aliases Dulyadin and Gamadhere , authorities said . Al-Shabaab is based in Somalia , and its violence has spread to Kenya before . In 2013 , militants attacked Nairobi 's upscale Westgate Mall , leaving 67 people dead . The terror group has intensified attacks in Kenya since the country sent troops to Somalia four years ago to help battle the militants . CNN 's Joseph Netto reported from Nairobi , and Faith Karimi reported and wrote from Atlanta .
The attack at a Al-Shabaab university last week killed 147 people , mostly students . The government is tracking the finances of people suspected of ties to Garissa .