By now, Washington residents know to be aware of their surroundings, not to display valuables, and to keep a firm grip on things. But property was grabbed from at least four people Monday in four so-called snatch robberies, including one on Capitol Hill.

In such robberies, property — often a smart phone or a wallet -- is seized by someone who runs quickly off.

The Capitol Hill incident was reported about 4 p.m. in the 600 block of Pennsylvania Avenue SE, a block or two from Eastern Market, in one of two of the robberies in which the thief was described to police as a teenager.

About an hour or so earlier, a similar offense was reported in the 3500 block of 11th Streeet NW, about a half mile northeast of the Columbia Heights Metro stop, in a neighborhood of rowhouses.

The first of the day’s incidents was reported about 11 a..m. in the 4700 block of South Capitol Street SE, near the Bellevue and Washington Highlands sections, close to the border with Prince George’s County.

The latest of the grab robberies occurred about 8 p.m. in t he 900 block of 46th Street NE, in the Deanwood area. As in the Capitol Hill robbery, the suspect was described as a teenager.

A detailed description of what was t aken was not immediately available.