A 35-year-old man has been arrested on suspicion of criminal damage after explosive devices were thrown at the home of former Sinn Fein leader Gerry Adams.
The Police Service of Northern Ireland (PSNI) said the man was detained on Tuesday night and is in custody.
Officers also carried out searches of properties in west Belfast on Tuesday night.
The homes of Adams and senior Sinn Fein figure Bobby Storey were attacked on Friday night, with the republican party condemning the “reprehensible and cowardly” attacks.
The PSNI previously said officers had seized “remnants of large industrial, firework-type devices, capable of causing serious damage or injury” at two houses in west Belfast.
Mr Adams said he was “very, very thankful” that no-one was hurt.
Party president Mary Lou McDonald said on Monday that Sinn Fein members were reviewing their security in the wake of the attacks.
While Sinn Fein has blamed dissident republicans for the attacks, police have yet to publicly attribute responsibility.
Hundreds of people attended a rally in west Belfast on Monday evening to demonstrate support for Mr Adams and Mr Storey.
At the event, Mrs McDonald branded the dissidents as “enemies of the people”.
