The balloons were sighted in the 24 hours from Thursday until 6 a.m. Friday (2200 UTC Thursday), the ministry announced in a statement as it gave one of its highest daily figures of the balloons.

Six balloons tied together in a bunch arrange themselves in an octahedral fashion. As balloons are popped the resulting number conforms to the molecular shapes of VSEPR theory. To Conduct ...

The balloons were sighted in the 24 hours from Thursday until 6 am Friday (2200 UTC, Thursday), the ministry said in a statement as it gave one of its highest daily figures of the balloons.