She had returned home just 20 days back. Suspecting that his wife was having an extramarital affair, the man picked up a razor blade and sliced her neck, said police. The woman, Sabreen, is dead.
The man did the same with his three-year-old daughter, Hiba, and then also tried to kill himself, the police added.
The accused husband, Javed, a native of Hapur's Pilkhua, and his daughter are said to be critical and admitted to a Delhi hospital.
The incident was reported from Uttar Pradesh's Ghaziabad.
Aneesh, Sabreen's brother-in-law, has told police that Javed, who got married during the lockdown, used to regularly beat his wife.
Over the last eight months, Sabreen was living with her in-laws.