article_snippet.sent: What worries authorities here is exactly that -- Mohamud was Kenyan.
article_snippet.sent: But now, say officials, Mohamud is in command of an Al-Shabaab militia based near Kenya's long, porous border with Somalia -- about 118 miles (190km) from Garissa -- who are believed to be responsible for numerous cross-border attacks into Kenya.
article_snippet.sent: The Islamist militant group, who are allied with al Qaeda, have been waging a bloody campaign for control of Somalia.
article_snippet.sent: With Kenyan troops part of an African Union force deployed in support of Somalia's United Nations-supported government, Kenya has now become a target.
article_snippet.sent: Now Mohamud stands accused of being behind Thursday's attack -- the deadliest attack in the nation since al Qaeda killed more than 200 people at the U.S. Embassy in Nairobi in 1998.
article_snippet.sent: But Mohamud is not Kenya's only homegrown terrorist.
article_snippet.sent: The Kenyan Interior Ministry has said at least one of the four gunmen who carried out the attack on the university was also Kenyan.
article_snippet.sent: Somalia's United Nations-supported government is concerned that Al-Shabaab is recruiting disaffected youth from inside the country.
article_snippet.sent: Our task of countering terrorism has been made all the more difficult by the fact that the planners and financiers of this brutality are deeply embedded in our communities," President Kenyatta said during an address to the country in the aftermath of the massacre.
article_snippet.sent: And so Kenyans must now look within to tackle this very real threat to the country's -- and the region's -- stability.
highlights_snippet.sent: Authorities fear the rise of homegrown terrorists in the African country .