Extra Characters in R Markdown output

I am processing a r mardown document. One chunk is outputting some extraneous characters. I can't find any reason for this. I would appreciate any suggestions for resolving this. In the code below "chartsList" is a list that contains ggplot images in the "plot" part of the list. The extra characters are "[[1]]"
The code:

```{r map, echo = FALSE, collapse=TRUE, fig.alt = paste0(locVal," Reference Map"), out.width='55%', fig.align= 'center', results='asis'}
print(chartsList[[1]][["plot"]])
The output:
![img|690x445](upload://uW9tH1lnrAcoHUrk8s9aWJQQCTg.png)
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