There's a bit a with a bottom loop connected to long oblique lines a tad to the left of the sīn that kinda looks like a Syriac (ʾEsṭrangēlā) ṭēt (ܛ), and Syriac was used for some time in Central Asia, but then again the rest of the letterforms don't seem to match up to Syriac as far as I can see.