Boston's police commissioner said the two suspects in the case had such a large cache of weapons that they were probably planning other attacks.

After the two brothers engaged in a gun battle with police early Friday, authorities found many unexploded homemade bombs at the scene, along with more than 250 rounds of ammunition.

Police Commissioner Ed Davis said the stockpile was “as dangerous as it gets in urban policing. We have reason to believe, based upon the evidence that was found at that scene — the explosions, the explosive ordnance that was unexploded and the firepower that they had — that they were going to attack other individuals. That’s my belief at this point.” Davis told CBS’s Face the Nation.

On Fox News Sunday, he said authorities cannot be positive there are not more explosives somewhere that have not been found. But the people of Boston are safe, he insisted.

The suspects in the twin bombings that killed three people and wounded more than 180 are two ethnic Chechen brothers from southern Russia — 19-year-old Dzhokhar Tsarnaev and his 26-year-old brother, Tamerlan. The older brother was killed last Thursday during a getaway attempt. The younger brother, Dzhokhar Tsarnaev, was still in serious condition Sunday after his capture Friday from a tarp-covered boat in a suburban Boston backyard.