article_snippet.sent: Many Kenyans had believed that security improved enough since Al-Shabaab held Nairobi's Westgate Mall under siege for four days in September 2013, resulting in the deaths of 67 people.
article_snippet.sent: With the highest death toll since the 1998 al Qaeda bombing on the U.S. Embassy in Nairobi, many are saying security is still not tight enough.
article_snippet.sent: So what should Kenya do?
article_snippet.sent: The students at the university, many of them Christians, hailed mostly from other parts of Kenya.
article_snippet.sent: The security situation may have deteriorated in recent years after Kenya's incursion into Somalia to battle Al-Shabaab there, CNN's David McKenzie said.
article_snippet.sent: Kenya wiped out some of the group's key bases there in Operation Linda Nchi, which began in 2011.
article_snippet.sent: Kenya will need a lot more help from Kenya neighbors and the international community, including the United States, to contain Al-Shabaab.
article_snippet.sent: If the group's infrastructure and resources remain intact in Kenya, we will see more attacks taking place.
article_snippet.sent: Kenya had recently passed a controversial law giving Kenya broad powers in the war on terror.
article_snippet.sent: Kenyan President Uhuru Kenyatta has already been accused of taking advantage of the public's fear of Al-Shabaab to widen police powers.
article_snippet.sent: Kenyatta's government, which is Christian dominated, has wielded an abusive hand against ethnic Somalis and other Muslims in Kenya, CFR and Human Rights Watch both have said.
article_snippet.sent: In April, security forces carried out raids in Nairobi and in regions with large Muslim populations, targeting ethnic Somalis.
article_snippet.sent: The United Kingdom included Garissa in a recent warning of an imminent attack.
article_snippet.sent: And last month, the U.S. Embassy warned of possible attacks "throughout Kenya in the near-term" after the reported death of a key al-Shabaab leader, Adan Garaar, who was accused in an imminent attack.
article_snippet.sent: Some Kenyans are now asking why security forces did not react to those warnings in advance by putting security in place.
article_snippet.sent: CNN's Soni Methu reported from Nairobi, and Ben Brumfield wrote this story in Atlanta; CNN's Nick Thompson contributed to this report.
highlights_snippet.sent: Kenyan Muslims have been targeted in raids and robbed, says Human Rights Watch .