Ukraine disputed Russian claims that a convoy of trucks that entered Ukraine was transporting humanitarian aid. The markets closed mixed with the Dow falling 38 points to 17,001 while Nasdaq rose 6 points to 4538.

On the upside

Heat Biologics (Nasdaq: HTBX) widened second quarter losses but the biopharmaceutical reported encouraging preliminary Phase 1 safety data for its bladder cancer treatment Vesigenurtacel-L.

Bargain hunters lifted shares of Autohome (NYSE: ATHM).

Shares of Amicus Therapeutics (Nasdaq: FOLD) extended its gains.

On the downside

Real Goods Solar (Nasdaq: RGSE) stock fell again after posting a wider loss earlier this week.

Investors locked in profits on Cisco (Nasdaq: CSCO).

Canaccord Genuity downgraded Cyberonics (Nasdaq: CYBX) from a Buy rating to a Hold rating.

In the broad market, declining issues outpaced advancers by a margin of more than 3 to 2 on the NYSE while advancers edged out decliners by nearly 10 to 9 on Nasdaq. The broader S&P 500 lost 3 points to 1988. Bitcoin slipped $3 to $515.