Israel’s military targeted Houthi rebels in Yemen’s Red Sea province of Hodeida on Monday with a punishing round of airstrikes, killing at least one person and wounding 35. The strikes came a day after the Iranian-backed rebels launched a missile that hit Israel’s main airport, Associated Press reported.

The rebels’ media office said at least six strikes hit the crucial Hodeida port Monday afternoon. Other strikes hit a cement factory in the Bajil district, located 55 kilometers (34 miles) northeast of Hodeida city, the rebels said. The extent of damage at the two facilities wasn’t immediately clear.

The Israeli military said more than 20 Israeli fighter planes took part in the operation, dropping more than 50 munitions on dozens of targets.

Hodeida residents said they heard explosions at the port, with flames and smoke seen rising over the area. Ambulance sirens were also heard across the city, they said, according to Associated Press.