The Short Version
The claim significantly overstates what the evidence confirms. While credible sources — including Le Monde and the Lebanese military — document Israeli ceasefire violations after April 17, including bombardments in Khiam, the specific assertion of "widespread explosions" across all six named towns (Qantara, Khiam, Naqoura, al-Bayada, Chama, and Houla) is not substantiated. Evidence for Naqoura and al-Bayada dates to April 4–5, before the ceasefire, and Qantara, Chama, and Houla lack any post-ceasefire corroboration.