Third down FG attempt is blocked

NFHS: Third down FG attempt is blocked behind the LOS, never crosses the LOS and is recoverd by K. Is it K's ball (and 4th down) or R's ball.

K's ball 4th down.

...and, the line to gain for K remains the same as it was on third down.

KWH wrote
...and, the line to gain for K remains the same as it was on third down.

Correct. No new series.