1. At least four people were killed in skirmishes with police, according to Mexican authorities.

2. But he predicted there would be small skirmishes between the two groups, perhaps continuing for several years.

3. Looking ahead, the researcher sees a number of key market skirmishes that will determine winners and losers.

4. The skirmishes focus on two key issues.

5. Video of the protests, which circulated widely on social media, showed repeated skirmishes between Trump supporters and protesters.

6. Black smoke billowed from the western side of town where skirmishes continued.

7. As the line to get in the venue moved ahead, the two groups shouted at each other and some skirmishes broke out.