A mortar fired from Afghanistan hit a home in Pakistan’s Bajaur district and killed four members of the same family, according to a local government official, as the latest round of cross-border violence between the two neighbours continued to deepen.

The reported strike is part of a broader escalation that has turned the Pakistan-Afghanistan frontier into one of the region’s most volatile flashpoints. The fighting, which flared late last month, has already included airstrikes, drone claims and retaliatory attacks, with both governments accusing each other of protecting militants or targeting civilians.

In the Bajaur case, the immediate human toll is clear even if the military picture remains contested. A residential property was destroyed, and two other people were wounded. That matters because it shows how the conflict is no longer confined to military sites or remote terrain: it is now hitting civilian homes in places where families have little warning and little protection.

The Guardian reported that Pakistan had carried out strikes on militant hideouts in Afghanistan’s Kandahar province, while Afghanistan’s defence ministry said it retaliated by attacking an army camp in South Waziristan. Each side rejected the other’s claims, and each accused the other of propaganda. The information war is now running alongside the military one.

Pakistan has described the clashes as an “open war”, a phrase that captures the seriousness of the rupture. The countries’ ceasefire brokered by Qatar last October has already broken down, and the renewed fighting has raised concerns about regional stability beyond the border itself.

Civilian deaths such as the Bajaur family’s underscore the danger of escalation. Even where the strikes are aimed at military assets or alleged militant hideouts, the geography of the frontier means nearby villages and towns are vulnerable to spillover. Homes can be destroyed by mortar rounds, and the distinction between frontline and civilian area can vanish in an instant.

The reporting also shows that the cycle of action and retaliation is widening geographically. Pakistan has accused Afghanistan’s Taliban rulers of harbouring the Pakistani Taliban, while Kabul denies that its territory is being used against neighbouring states. Those allegations, long familiar, are now being argued over in the context of live attacks rather than diplomatic warnings.

For people living in border districts like Bajaur, the main issue is not which capital publishes the stronger statement. It is whether the next strike lands on a military post, a supply depot or a house in the middle of the night. This latest incident suggests that the answer increasingly depends on luck.

The conflict is still developing, but the civilian casualty report from Bajaur is a reminder that each new exchange brings a risk of widening the human cost beyond the military objectives both governments cite.