The Israel Defense Forces (IDF) announced during the reporting window from 12:16 PM to 3:16 PM UTC on December 17, 2025, that it has launched an investigation into a mortar fired by its troops that struck Gaza City this afternoon, wounding several Palestinians. The mortar was launched as part of military activities on the Israeli side of the ceasefire line and deviated from its target, according to the IDF. The IDF stated it is aware of reports of casualties from the incident. Troops fired the mortar during ongoing operations near the ceasefire line, the army confirmed in its announcement. No further details on the number of wounded or the exact timing of the strike were provided in the IDF statement reported during this three-hour period.