Why are Iran and Pakistan firing rockets at each other?

News Snapshot:

A deadly tit-for-tat exchange across the border separating Iran and Pakistan has left at least 11 people dead, including six children. In a time of high tension in the region, with conflicts erupting on multiple fronts, the explosive confrontation has stoked fears of a wider war between the two neighbours. But how likely is that to happen? Sky News spoke to two experts about what's going on between Iran and Pakistan, and what it means going forward. Please use Chrome browser for a more accessible video player 0:22 Pakistan launches deadly strike on Iran Did Pakistan fire rockets across the...