Riyadh-led military alliance says its air strikes hit "legitimate" Houthi military sites in densely populated capital.
Violent explosions have rocked the northern neighbourhoods of Yemen's Sanaa city following raids by the Saudi-led coalition, according to residents.
Ahead of Tuesday's strikes, the coalition said it was launching air raids on "legitimate" Houthi military targets in the highly condensed capital, and asked civilians not to gather around or approach potential targets.
The raids targeted two military sites, residents told Reuters news agency.
Houthi rebels acknowledged raids on a district of northern Sanaa without providing details of casualties or damage.
The coalition added that its raids had destroyed a high-value ballistic-missile target.
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Drone attacks in Saudi
The Houthis have repeatedly launched cross-border attacks on Saudi Arabia using drones and missiles since the coalition intervened in Yemen in March 2015 after the movement ousted the Saudi-backed government from the capital.
Yemen's Houthi movement said on Saturday it had fired 14 drones at several Saudi Arabian cities, including at Saudi Aramco facilities in Jeddah.
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The conflict, seen as a proxy war between Saudi Arabia and Iran, has been in a military stalemate for years.
The Houthis are pressing an offensive in Marib, the internationally recognised government's last northern stronghold, as well as in other areas in Yemen.