LONDON — The homes of the former Sinn Fein leader Gerry Adams and another prominent member of the Northern Ireland republican party were attacked with explosive devices, officials said Saturday.

No one was injured in the attacks on Friday night, but Mr. Adams said two of his grandchildren were in the driveway of his home in West Belfast minutes before the explosions.

“For those who were involved in the attack, if they have the gumption to sneak up on our homes, I’d like them or their representatives to come and meet me,” Mr. Adams said Saturday. “I’d like them to sit down and explain to me what this is about.”

The home of Bobby Storey, an activist in Sinn Fein which was until recently the political wing of the banned Provisional Irish Republic Army, was also attacked. Northern Ireland’s police said officers seized “remnants of large industrial, firework-type devices capable of causing serious damage or injury” at each house. No arrests were reported.