تَأَخَّرَ الْمُسَافِرُ. انْقَطَعَ الطَّرِيقُ.
The traveler was delayed. The road was closed.
If the first report naturally raises “Why was the traveler delayed?”, the second answers that implied question and can be analyzed as explanatory resumption. The separation represents an implicit question–answer relation.
But if the two statements are independent pieces of news, that relation cannot be imposed automatically. An implied question must be supported by the intended discourse.