As the bunch of brightly-coloured balloons floated into Gaza's evening sky, there was a piercing crackle of gunfire.
Moments earlier, the balloons had been launched by a group of masked young Palestinian men huddled near the Al-Bureij refugee camp.
Explosives tied to balloons and kites first emerged as a weapon in
Gaza, ruled by the Islamist group Hamas, during intense
protests in 2018, when the devices drifted across the border daily, causing thousands of fires in
Israeli farms and communities.